Bug 1472972 - Remove Fluent migration recipes for Firefox 61 r?pike draft
authorFrancesco Lodolo (:flod) <flod@lodolo.net>
Tue, 03 Jul 2018 13:58:05 +0200
changeset 813600 52106963e2654ffc5f9add643e4d6dca0e4a1f58
parent 813599 250255a7e318e8217c73be0a0f3c832927462492
push id114930
push userbmo:francesco.lodolo@gmail.com
push dateTue, 03 Jul 2018 11:58:54 +0000
reviewerspike
bugs1472972
milestone63.0a1
Bug 1472972 - Remove Fluent migration recipes for Firefox 61 r?pike MozReview-Commit-ID: DnhDlFPf070
python/l10n/fluent_migrations/bug_1415733_preferences_search.py
python/l10n/fluent_migrations/bug_1419547_preferences_containers.py
python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py
python/l10n/fluent_migrations/bug_1445084_preferences_search_results.py
python/l10n/fluent_migrations/bug_1445694_preferences_sync.py
python/l10n/fluent_migrations/bug_1446180_preferences_privacy.py
python/l10n/fluent_migrations/bug_1451992_preferences_applicationManager.py
python/l10n/fluent_migrations/bug_1451992_preferences_blocklists.py
python/l10n/fluent_migrations/bug_1451992_preferences_clearSiteData.py
python/l10n/fluent_migrations/bug_1451992_preferences_colors.py
python/l10n/fluent_migrations/bug_1451992_preferences_connection.py
python/l10n/fluent_migrations/bug_1451992_preferences_fonts.py
python/l10n/fluent_migrations/bug_1451992_preferences_languages.py
python/l10n/fluent_migrations/bug_1451992_preferences_permissions.py
python/l10n/fluent_migrations/bug_1451992_preferences_selectbookmark.py
python/l10n/fluent_migrations/bug_1451992_preferences_sitedata.py
python/l10n/fluent_migrations/bug_1451992_preferences_translation.py
python/l10n/fluent_migrations/bug_1453480_preferences_dom2_resources.py
python/l10n/fluent_migrations/bug_1453540_preferences_remaining_dtd.py
python/l10n/fluent_migrations/bug_1453800_container_removal.py
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1415733_preferences_search.py
+++ /dev/null
@@ -1,237 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate.transforms import REPLACE
-from fluent.migrate import COPY
-
-
-def migrate(ctx):
-    """Bug 1415733 - Migrate the "Search" section of Preferences to the new Localization API, part {index}"""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('search-bar-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'searchBar.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-bar-hidden'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'searchBar.hidden.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-bar-shown'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'searchBar.shown.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-engine-default-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'defaultSearchEngine.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-engine-default-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'chooseYourDefaultSearchEngine2.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-suggestions-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'provideSearchSuggestions.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'provideSearchSuggestions.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-show-suggestions-url-bar-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'showURLBarSuggestions2.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'showURLBarSuggestions2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-show-suggestions-above-history-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'showSearchSuggestionsAboveHistory.label'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-suggestions-cant-show'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'urlBarSuggestionsPermanentPB.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE(
-                            '-brand-short-name'
-                        )
-                    }
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-one-click-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'oneClickSearchEngines.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-one-click-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'chooseWhichOneToDisplay2.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-choose-engine-column'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'engineNameColumn.label'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-choose-keyword-column'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'engineKeywordColumn.label'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-restore-default'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'restoreDefaultSearchEngines.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'restoreDefaultSearchEngines.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-remove-engine'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'removeEngine.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/search.dtd',
-                            'removeEngine.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-find-more-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/search.dtd',
-                    'findMoreSearchEngines.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-keyword-warning-title'),
-                value=COPY(
-                    'browser/chrome/browser/engineManager.properties',
-                    'duplicateTitle'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-keyword-warning-engine'),
-                value=REPLACE(
-                    'browser/chrome/browser/engineManager.properties',
-                    'duplicateEngineMsg',
-                    {
-                        '%S': EXTERNAL_ARGUMENT(
-                            'name'
-                        )
-                    }
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-keyword-warning-bookmark'),
-                value=COPY(
-                    'browser/chrome/browser/engineManager.properties',
-                    'duplicateBookmarkMsg'
-                )
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1419547_preferences_containers.py
+++ /dev/null
@@ -1,491 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-
-def migrate(ctx):
-    """Bug 1419547 - Migrate Preferences::Containers to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('containers-back-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/containers.dtd',
-                    'backLink2.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.dtd',
-                    'paneContainers.title',
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-add-button'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'addButton.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'addButton.accesskey'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-preferences-button'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'preferencesButton.label'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-remove-button'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'removeButton.label'
-                        )
-                    ),
-                ]
-            ),
-        ]
-    )
-
-    ctx.add_transforms(
-        'browser/browser/preferences/containers.ftl',
-        'browser/browser/preferences/containers.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('containers-window-new'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'window.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/containers.dtd',
-                                'window.width',
-                            ),
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-window-update'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.updateContainerTitle',
-                            {
-                                '%S': EXTERNAL_ARGUMENT('name')
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/containers.dtd',
-                                'window.width',
-                            ),
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-window-close'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'windowClose.key',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Term(
-                id=FTL.Identifier('-containers-labels-style'),
-                value=CONCAT(
-                    FTL.TextElement('min-width: '),
-                    COPY(
-                        'browser/chrome/browser/preferences/containers.properties',
-                        'containers.labelMinWidth',
-                    ),
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-name-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/containers.dtd',
-                    'name2.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'name2.accesskey',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            MESSAGE_REFERENCE('-containers-labels-style'),
-                        )
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-name-text'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('placeholder'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'name.placeholder',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/containers.dtd',
-                    'icon2.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'icon2.accesskey',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            MESSAGE_REFERENCE('-containers-labels-style'),
-                        )
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/containers.dtd',
-                    'color2.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'color2.accesskey',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            MESSAGE_REFERENCE('-containers-labels-style'),
-                        )
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-button-done'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'button.ok.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.dtd',
-                            'button.ok.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-blue'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.blue.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-turquoise'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.turquoise.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-green'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.green.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-yellow'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.yellow.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-orange'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.orange.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-red'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.red.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-pink'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.pink.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-color-purple'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.purple.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-fingerprint'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.fingerprint.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-briefcase'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.briefcase.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-dollar'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.dollar.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-cart'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.cart.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-circle'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.circle.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-vacation'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.vacation.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-gift'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.gift.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-food'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.food.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-fruit'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.fruit.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-pet'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.pet.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-tree'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.tree.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-icon-chill'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/containers.properties',
-                            'containers.chill.label',
-                        ),
-                    ),
-                ],
-            ),
-
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py
+++ /dev/null
@@ -1,120 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate import CONCAT, REPLACE
-
-
-def migrate(ctx):
-    """Bug 1438375 - Migrate Extension Controlled settings in Preferences to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-homepage-override'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.homepage_override2',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-new-tab-url'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.newTabURL2',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-default-search'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.defaultSearch',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-privacy-containers'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.privacy.containers',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-websites-tracking-protection-mode'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.websites.trackingProtectionMode',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-proxy-config'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.proxyConfig',
-                    {
-                        '%1$S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        ),
-                        '%2$S': MESSAGE_REFERENCE('-brand-short-name'),
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-enable'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.enable',
-                    {
-                        '%1$S': FTL.TextElement('<img data-l10n-name="addons-icon"/>'),
-                        '%2$S': FTL.TextElement('<img data-l10n-name="menu-icon"/>'),
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('network-proxy-connection-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'connectionDesc.label',
-                    {
-                        '%S': MESSAGE_REFERENCE('-brand-short-name'),
-                    }
-                )
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1445084_preferences_search_results.py
+++ /dev/null
@@ -1,69 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-
-def migrate(ctx):
-    """Bug 1445084 - Migrate search results pane of Preferences to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('search-input-box'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/preferences.dtd',
-                                'searchField.width'
-                            )
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('placeholder'),
-                        FTL.Pattern([
-                            FTL.Placeable(FTL.SelectExpression(
-                                expression=FTL.CallExpression(
-                                    callee=FTL.Function('PLATFORM')
-                                ),
-                                variants=[
-                                    FTL.Variant(
-                                        key=FTL.VariantName('windows'),
-                                        default=False,
-                                        value=COPY(
-                                            'browser/chrome/browser/preferences/preferences.properties',
-                                            'searchInput.labelWin'
-                                        )
-                                    ),
-                                    FTL.Variant(
-                                        key=FTL.VariantName('other'),
-                                        default=True,
-                                        value=COPY(
-                                            'browser/chrome/browser/preferences/preferences.properties',
-                                            'searchInput.labelUnix'
-                                        )
-                                    )
-                                ]
-                            ))
-                        ])
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-results-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.dtd',
-                    'paneSearchResults.title'
-                )
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1445694_preferences_sync.py
+++ /dev/null
@@ -1,563 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-# Custom extension of the CONCAT migration tailored to concat
-# two strings separated by a placeable.
-class CONCAT_BEFORE_AFTER(CONCAT):
-    def __call__(self, ctx):
-        assert len(self.elements) == 3
-        pattern_before, placeable, pattern_after = self.elements
-        elem_before = pattern_before.elements[0]
-        elem_after = pattern_after.elements[0]
-
-        if isinstance(elem_before, FTL.TextElement) and elem_before.value[-1] != " ":
-            elem_before.value += " "
-        if isinstance(elem_after, FTL.TextElement) and elem_after.value[0] != " ":
-            elem_after.value = " " + elem_after.value
-        return super(CONCAT_BEFORE_AFTER, self).__call__(ctx)
-
-def migrate(ctx):
-    """Bug 1445694 - Migrate Preferences::Sync to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/branding/sync-brand.ftl',
-        'browser/browser/branding/sync-brand.ftl',
-        [
-            FTL.Term(
-                id=FTL.Identifier('-fxaccount-brand-name'),
-                value=COPY(
-                    'browser/chrome/browser/syncBrand.dtd',
-                    'syncBrand.fxAccount.label'
-                )
-            ),
-        ]
-    )
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('sync-signedout-caption'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedOut.caption',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedout-description'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedOut.description',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedout-account-title'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedOut.accountBox.title',
-                    {
-                        '&syncBrand.fxAccount.label;': MESSAGE_REFERENCE('-fxaccount-brand-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedout-account-create'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedOut.accountBox.create2',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'signedOut.accountBox.create2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedout-account-signin'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'signedOut.accountBox.signin2',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'signedOut.accountBox.signin2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-profile-picture'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'profilePicture.tooltip',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-disconnect'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'disconnect3.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'disconnect3.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-manage-account'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'verifiedManage.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'verifiedManage.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedin-unverified'),
-                value=CONCAT_BEFORE_AFTER(
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'signedInUnverified.beforename.label',
-                    ),
-                    EXTERNAL_ARGUMENT('email'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'signedInUnverified.aftername.label',
-                    ),
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedin-login-failure'),
-                value=CONCAT_BEFORE_AFTER(
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'signedInLoginFailure.beforename.label',
-                    ),
-                    EXTERNAL_ARGUMENT('email'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'signedInLoginFailure.aftername.label',
-                    ),
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-resend-verification'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'resendVerification.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'resendVerification.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-remove-account'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'removeAccount.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'removeAccount.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-sign-in'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'signIn.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'signIn.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedin-settings-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedIn.settings.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-signedin-settings-desc'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'signedIn.settings.description',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-bookmarks'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.bookmarks.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.bookmarks.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-history'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.history.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.history.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-tabs'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.tabs.label2',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.tabs.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.tabs.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-logins'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.logins.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.logins.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.logins.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-addresses'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addresses.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addresses.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addresses.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-creditcards'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.creditcards.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.creditcards.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.creditcards.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-addons'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addons.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addons.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.addons.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-engine-prefs'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        FTL.Pattern([
-                            FTL.Placeable(FTL.SelectExpression(
-                                expression=FTL.CallExpression(
-                                    callee=FTL.Function('PLATFORM')
-                                ),
-                                variants=[
-                                    FTL.Variant(
-                                        key=FTL.VariantName('windows'),
-                                        default=False,
-                                        value=COPY(
-                                            'browser/chrome/browser/preferences/sync.dtd',
-                                            'engine.prefsWin.label'
-                                        )
-                                    ),
-                                    FTL.Variant(
-                                        key=FTL.VariantName('other'),
-                                        default=True,
-                                        value=COPY(
-                                            'browser/chrome/browser/preferences/sync.dtd',
-                                            'engine.prefs.label'
-                                        )
-                                    )
-                                ]
-                            )),
-                        ]),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltiptext'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.prefs.title'
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'engine.prefs.accesskey'
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-device-name-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'fxaSyncDeviceName.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-device-name-change'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'changeSyncDeviceName2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'changeSyncDeviceName2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-device-name-cancel'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'cancelChangeSyncDeviceName.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'cancelChangeSyncDeviceName.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-device-name-save'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'saveChangeSyncDeviceName.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/sync.dtd',
-                            'saveChangeSyncDeviceName.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-mobilepromo-single'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'mobilepromo.singledevice',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-mobilepromo-multi'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'mobilepromo.multidevice',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-tos-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'prefs.tosLink.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-fxa-privacy-notice'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/sync.dtd',
-                    'fxaPrivacyNotice.link.label',
-                ),
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1446180_preferences_privacy.py
+++ /dev/null
@@ -1,1201 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE
-from fluent.migrate.transforms import REPLACE
-from fluent.migrate import COPY
-
-
-def migrate(ctx):
-    """Bug 1446180 - Migrate Preferences::Privacy to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/branding/official/brand.ftl',
-        'browser/branding/official/brand.ftl',
-        [
-            FTL.Term(
-                id=FTL.Identifier('-vendor-short-name'),
-                value=COPY(
-                    'browser/branding/official/brand.dtd',
-                    'vendorShortName'
-                )
-            ),
-        ]
-    )
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('privacy-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.dtd',
-                    'browserPrivacy.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('forms-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/security.dtd',
-                    'formsAndPasswords.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('forms-exceptions'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'passwordExceptions.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'passwordExceptions.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('forms-saved-logins'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'savedLogins.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'savedLogins.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('forms-master-pw-use'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'useMasterPassword.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'useMasterPassword.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('forms-master-pw-change'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'changeMasterPassword.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'changeMasterPassword.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'history.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'rememberDescription1.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-dontremember-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'dontrememberDescription.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-private-browsing-permanent'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'privateBrowsingPermanent2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'privateBrowsingPermanent2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'rememberHistory2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'rememberHistory2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-search-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'rememberSearchForm.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'rememberSearchForm.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-clear-on-close-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearOnClose.label',
-                            {
-                                '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearOnClose.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-clear-on-close-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearOnCloseSettings.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearOnCloseSettings.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-clear-button'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearHistoryButton.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'clearHistoryButton.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'siteData1.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-learn-more'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'siteDataLearnMoreLink.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-accept-cookies-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptCookies4.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptCookies4.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-block-cookies-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'blockCookies.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'blockCookies.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-keep-until'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'keepUntil2.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'keepUntil2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-accept-third-party-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'acceptThirdParty3.pre.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptThirdParty3.pre.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-accept-third-party-always-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptThirdParty.always.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-accept-third-party-visited-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptThirdParty.visited.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-accept-third-party-never-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'acceptThirdParty.never.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-clear'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'clearSiteData1.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'clearSiteData1.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'siteDataSettings1.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'siteDataSettings1.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sitedata-cookies-exceptions'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'cookieExceptions.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'cookieExceptions.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'addressBar.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-suggest'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'addressBar.suggest.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-locbar-history-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.history2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.history2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-locbar-bookmarks-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.bookmarks.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.bookmarks.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-locbar-openpage-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.openpage.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'locbar.openpage.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('addressbar-suggestions-settings'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'suggestionSettings2.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'trackingProtectionHeader2.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-mode-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'trackingProtection3.radioGroupLabel',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-mode-always'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionAlways.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionAlways.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-mode-private'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionPrivate.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionPrivate.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-mode-never'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionNever.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionNever.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-pbm-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'trackingProtectionPBM6.label',
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionPBM6.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-exceptions'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionExceptions.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'trackingProtectionExceptions.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-change-block-list'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'changeBlockList2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'changeBlockList2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'permissions.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-location'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/content.dtd',
-                    'locationPermissions.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-location-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'locationSettingsButton.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'locationSettingsButton.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-camera'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/content.dtd',
-                    'cameraPermissions.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-camera-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'cameraSettingsButton.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'cameraSettingsButton.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-microphone'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/content.dtd',
-                    'microphonePermissions.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-microphone-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'microphoneSettingsButton.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'microphoneSettingsButton.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-notification'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/content.dtd',
-                    'notificationPermissions.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-notification-settings'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'notificationSettingsButton.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'notificationSettingsButton.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-notification-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/content.dtd',
-                    'notificationPermissionsLearnMore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-notification-pause'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/preferences.properties',
-                            'pauseNotifications.label',
-                            {
-                                '%S': MESSAGE_REFERENCE('-brand-short-name')
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/preferences.properties',
-                            'pauseNotifications.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-block-popups'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'blockPopups.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'blockPopups.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-block-popups-exceptions'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'popupExceptions.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/content.dtd',
-                            'popupExceptions.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-addon-install-warning'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'warnOnAddonInstall2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'warnOnAddonInstall2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-addon-exceptions'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'addonExceptions.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'addonExceptions.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-a11y-privacy-checkbox'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'a11yPrivacy.checkbox.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'a11yPrivacy.checkbox.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-a11y-privacy-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'a11yPrivacy.learnmore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-header'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'dataCollection.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'dataCollectionDesc.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-privacy-notice'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'dataCollectionPrivacyNotice.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-health-report'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'enableHealthReport2.label',
-                            {
-                                '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name'),
-                                'Mozilla': MESSAGE_REFERENCE('-vendor-short-name'),
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'enableHealthReport2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-health-report-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'healthReportLearnMore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-health-report-disabled'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'healthReportingDisabled.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-browser-errors'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'collectBrowserErrors.label',
-                            {
-                                '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name'),
-                                'Mozilla': MESSAGE_REFERENCE('-vendor-short-name'),
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'collectBrowserErrors.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-browser-errors-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'collectBrowserErrorsLearnMore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-backlogged-crash-reports'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        REPLACE(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'sendBackloggedCrashReports.label',
-                            {
-                                '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                            },
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'sendBackloggedCrashReports.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('collection-backlogged-crash-reports-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'crashReporterLearnMore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/security.dtd',
-                    'security.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-browsing-protection'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/security.dtd',
-                    'browsingProtection.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-enable-safe-browsing'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'enableSafeBrowsing.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'enableSafeBrowsing.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-enable-safe-browsing-link'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'enableSafeBrowsingLearnMore.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-block-downloads'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'blockDownloads.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'blockDownloads.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('security-block-uncommon-software'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'blockUncommonAndUnwanted.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/security.dtd',
-                            'blockUncommonAndUnwanted.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'certificateTab.label',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-personal-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/advanced.dtd',
-                    'certPersonal2.description',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-select-auto-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'selectCerts.auto',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'selectCerts.auto.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-select-ask-option'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'selectCerts.ask',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'selectCerts.ask.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-enable-ocsp'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'enableOCSP.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'enableOCSP.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-view'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'viewCerts2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'viewCerts2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('certs-devices'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'viewSecurityDevices2.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/advanced.dtd',
-                            'viewSecurityDevices2.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_applicationManager.py
+++ /dev/null
@@ -1,116 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import EXTERNAL_ARGUMENT
-from fluent.migrate import COPY, REPLACE
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::ApplicationManager to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/applicationManager.ftl',
-        'browser/browser/preferences/applicationManager.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('app-manager-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/applicationManager.dtd',
-                            'appManager.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        COPY(
-                            'browser/chrome/browser/preferences/applicationManager.dtd',
-                            'appManager.style',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-remove'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/applicationManager.dtd',
-                            'remove.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/applicationManager.dtd',
-                            'remove.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-handle-webfeeds'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/applicationManager.properties',
-                    'descriptionApplications',
-                    {
-                        '%S': COPY(
-                            'browser/chrome/browser/preferences/applicationManager.properties',
-                            'handleWebFeeds',
-                        )
-                    }
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-handle-protocol'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/applicationManager.properties',
-                    'descriptionApplications',
-                    {
-                        '%S': REPLACE(
-                            'browser/chrome/browser/preferences/applicationManager.properties',
-                            'handleProtocol',
-                            {
-                                '%S': EXTERNAL_ARGUMENT('type')
-                            }
-                        )
-                    }
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-handle-file'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/applicationManager.properties',
-                    'descriptionApplications',
-                    {
-                        '%S': REPLACE(
-                            'browser/chrome/browser/preferences/applicationManager.properties',
-                            'handleFile',
-                            {
-                                '%S': EXTERNAL_ARGUMENT('type')
-                            }
-                        )
-                    }
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-web-app-info'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/applicationManager.properties',
-                    'descriptionWebApp',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('app-manager-local-app-info'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/applicationManager.properties',
-                    'descriptionLocalApp',
-                ),
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_blocklists.py
+++ /dev/null
@@ -1,113 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Blocklists to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/blocklists.ftl',
-        'browser/browser/preferences/blocklists.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('blocklist-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'window.title',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/blocklists.dtd',
-                                'window.width'
-                            )
-                        )
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('blocklist-desc'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'blockliststext',
-                    {
-                        'Firefox': MESSAGE_REFERENCE('-brand-short-name')
-                    },
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('blocklist-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'windowClose.key',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('blocklist-treehead-list'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'treehead.list.label',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('blocklist-button-cancel'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'button.cancel.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'button.cancel.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('blocklist-button-ok'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'button.ok.label',
-                        ),
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/blocklists.dtd',
-                            'button.ok.accesskey',
-                        ),
-                    ),
-                ],
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_clearSiteData.py
+++ /dev/null
@@ -1,115 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::ClearSiteData to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/clearSiteData.ftl',
-        'browser/browser/preferences/clearSiteData.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'window.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/clearSiteData.dtd',
-                                'window.width'
-                            )
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/clearSiteData.dtd',
-                    'window.description',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-cookies-info'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/clearSiteData.dtd',
-                    'clearSiteData.description'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-cache-info'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/clearSiteData.dtd',
-                    'clearCache.description'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-cancel'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'button.cancel.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'button.cancel.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('clear-site-data-clear'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'button.clear.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/clearSiteData.dtd',
-                            'button.clear.accesskey'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_colors.py
+++ /dev/null
@@ -1,248 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Colors to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/colors.ftl',
-        'browser/browser/preferences/colors.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('colors-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'colorsDialog.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        FTL.Pattern(
-                            elements=[
-                                FTL.Placeable(
-                                    expression=FTL.SelectExpression(
-                                        expression=FTL.CallExpression(
-                                            callee=FTL.Function('PLATFORM')
-                                        ),
-                                        variants=[
-                                            FTL.Variant(
-                                                key=FTL.VariantName('macos'),
-                                                default=False,
-                                                value=CONCAT(
-                                                    FTL.TextElement('width: '),
-                                                    COPY(
-                                                        'browser/chrome/browser/preferences/colors.dtd',
-                                                        'window.macWidth'
-                                                    )
-                                                )
-                                            ),
-                                            FTL.Variant(
-                                                key=FTL.VariantName('other'),
-                                                default=True,
-                                                value=CONCAT(
-                                                    FTL.TextElement('width: '),
-                                                    COPY(
-                                                        'browser/chrome/browser/preferences/colors.dtd',
-                                                        'window.width'
-                                                    )
-                                                )
-                                            )
-                                        ]
-                                    )
-                                )
-                            ]
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'toolkit/chrome/global/preferences.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-page-override'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'overrideDefaultPageColors2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'overrideDefaultPageColors2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-page-override-option-always'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'overrideDefaultPageColors.always.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-page-override-option-auto'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'overrideDefaultPageColors.auto.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-page-override-option-never'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'overrideDefaultPageColors.never.label'
-                        ),
-                    ),
-                ],
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-text-and-background'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'color'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-text-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'textColor2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'textColor2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-background'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'backgroundColor2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'backgroundColor2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-use-system'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'useSystemColors.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'useSystemColors.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-underline-links'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'underlineLinks.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'underlineLinks.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-links-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'links'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-unvisited-links'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'linkColor2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'linkColor2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('colors-visited-links'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/colors.dtd',
-                    'visitedLinkColor2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/colors.dtd',
-                            'visitedLinkColor2.accesskey'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_connection.py
+++ /dev/null
@@ -1,466 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Connection to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/connection.ftl',
-        'browser/browser/preferences/connection.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('connection-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'connectionsDialog.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        FTL.Pattern(
-                            elements=[
-                                FTL.Placeable(
-                                    expression=FTL.SelectExpression(
-                                        expression=FTL.CallExpression(
-                                            callee=FTL.Function('PLATFORM')
-                                        ),
-                                        variants=[
-                                            FTL.Variant(
-                                                key=FTL.VariantName('macos'),
-                                                default=False,
-                                                value=CONCAT(
-                                                    FTL.TextElement('width: '),
-                                                    COPY(
-                                                        'browser/chrome/browser/preferences/connection.dtd',
-                                                        'window.macWidth2'
-                                                    )
-                                                )
-                                            ),
-                                            FTL.Variant(
-                                                key=FTL.VariantName('other'),
-                                                default=True,
-                                                value=CONCAT(
-                                                    FTL.TextElement('width: '),
-                                                    COPY(
-                                                        'browser/chrome/browser/preferences/connection.dtd',
-                                                        'window.width2'
-                                                    )
-                                                )
-                                            )
-                                        ]
-                                    )
-                                )
-                            ]
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'toolkit/chrome/global/preferences.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-disable-extension'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/main.dtd',
-                            'disableExtension.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-configure'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'proxyTitle.label2'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-option-no'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'noProxyTypeRadio.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'noProxyTypeRadio.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-option-system'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'systemTypeRadio.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'systemTypeRadio.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-option-auto'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'WPADTypeRadio.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'WPADTypeRadio.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-option-manual'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'manualTypeRadio2.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'manualTypeRadio2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-http'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'http2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'http2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-http-port'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'port2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'HTTPport.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-http-share'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'shareproxy.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'shareproxy.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-ssl'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'ssl2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'ssl2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-ssl-port'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'port2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'SSLport.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-ftp'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'ftp2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'ftp2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-ftp-port'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'port2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'FTPport.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-socks'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'socks2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socks2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-socks-port'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'port2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'SOCKSport.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-socks4'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socks4.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socks4.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-socks5'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socks5.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socks5.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-noproxy'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'noproxy2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'noproxy2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-noproxy-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/connection.dtd',
-                    'noproxyExplain.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-autotype'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'autoTypeRadio2.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'autoTypeRadio2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-reload'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'reload.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'reload.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-autologin'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'autologinproxy.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'autologinproxy.accesskey'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('tooltip'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'autologinproxy.tooltip'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('connection-proxy-socks-remote-dns'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socksRemoteDNS.label2'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/connection.dtd',
-                            'socksRemoteDNS.accesskey'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_fonts.py
+++ /dev/null
@@ -1,796 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Fonts to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/fonts.ftl',
-        'browser/browser/preferences/fonts.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('fonts-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'fontsDialog.title'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-window-close'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'toolkit/chrome/global/preferences.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'fonts.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'fonts.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-arabic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.arabic'
-                        )
-                    )
-                ]
-            ),
-
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-armenian'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.armenian'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-bengali'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.bengali'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-simpl-chinese'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.simpl-chinese'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-trad-chinese-hk'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.trad-chinese-hk'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-trad-chinese'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.trad-chinese'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-cyrillic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.cyrillic'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-devanagari'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.devanagari'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-ethiopic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.ethiopic'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-georgian'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.georgian'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-el'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.el'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-gujarati'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.gujarati'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-gurmukhi'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.gurmukhi'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-japanese'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.japanese'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-hebrew'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.hebrew'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-kannada'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.kannada'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-khmer'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.khmer'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-korean'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.korean'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-latin'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.latin'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-malayalam'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.malayalam'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-math'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.math'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-odia'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.odia'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-sinhala'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.sinhala'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-tamil'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.tamil'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-telugu'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.telugu'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-thai'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.thai'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-tibetan'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.tibetan'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-canadian'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.canadian'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-langgroup-other'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'font.langGroup.other'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-proportional-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'proportional2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'proportional2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-default-serif'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'useDefaultFontSerif.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-default-sans-serif'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'useDefaultFontSansSerif.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-proportional-size'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'size2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'sizeProportional.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-serif'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'serif2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'serif2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-sans-serif'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'sans-serif2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'sans-serif2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-monospace'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'monospace2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'monospace2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-monospace-size'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'size2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'sizeMonospace.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-minsize'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'minSize2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'minSize2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-minsize-none'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'minSize.none'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-allow-own'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'allowPagesToUseOwn.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'allowPagesToUseOwn.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'languages.customize.Fallback2.grouplabel'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'languages.customize.Fallback2.desc'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-label'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/fonts.dtd',
-                    'languages.customize.Fallback3.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback3.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-auto'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.auto'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-arabic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.arabic'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-baltic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.baltic'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-ceiso'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.ceiso'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-cewindows'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.cewindows'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-simplified'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.simplified'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-traditional'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.traditional'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-cyrillic'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.cyrillic'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-greek'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.greek'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-hebrew'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.hebrew'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-japanese'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.japanese'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-korean'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.korean'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-thai'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.thai'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-turkish'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.turkish'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-vietnamese'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.vietnamese'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('fonts-languages-fallback-name-other'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/fonts.dtd',
-                            'languages.customize.Fallback.other'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_languages.py
+++ /dev/null
@@ -1,159 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Languages to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/languages.ftl',
-        'browser/browser/preferences/languages.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('languages-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.Header'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/languages.dtd',
-                                'window.width'
-                            )
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'toolkit/chrome/global/preferences.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-description'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/languages.dtd',
-                    'languages.customize2.description'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-spoof-english'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.spoofEnglish'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-moveup'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.moveUp.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.moveUp.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-movedown'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.moveDown.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.moveDown.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-remove'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.deleteButton.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.deleteButton.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-select-language'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('placeholder'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.selectLanguage.label'
-                        )
-                    ),
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('languages-customize-add'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.addButton.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/languages.dtd',
-                            'languages.customize.addButton.accesskey'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_permissions.py
+++ /dev/null
@@ -1,237 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Permissions to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/permissions.ftl',
-        'browser/browser/preferences/permissions.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('permissions-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'window.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/permissions.dtd',
-                                'window.width'
-                            )
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-address'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/permissions.dtd',
-                    'address2.label'
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'address2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-block'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'block.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'block.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-session'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'session.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'session.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-allow'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'allow.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'allow.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-site-name'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'treehead.sitename2.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-status'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'treehead.status.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-remove'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'removepermission2.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'removepermission2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-remove-all'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'removeallpermissions2.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'removeallpermissions2.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-button-cancel'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'button.cancel.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'button.cancel.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-button-ok'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'button.ok.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'button.ok.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('permissions-searchbox'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('placeholder'),
-                        COPY(
-                            'browser/chrome/browser/preferences/permissions.dtd',
-                            'searchbox.placeholder'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_selectbookmark.py
+++ /dev/null
@@ -1,43 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Select Bookmark to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/selectBookmark.ftl',
-        'browser/browser/preferences/selectBookmark.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('select-bookmark-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/selectBookmark.dtd',
-                            'selectBookmark.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: 32em;')
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('select-bookmark-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/selectBookmark.dtd',
-                    'selectBookmark.label'
-                )
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_sitedata.py
+++ /dev/null
@@ -1,187 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Site Data to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/siteDataSettings.ftl',
-        'browser/browser/preferences/siteDataSettings.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('site-data-settings-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'window2.title'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-search-textbox'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('placeholder'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'searchTextboxPlaceHolder'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'searchTextboxPlaceHolder.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-column-host'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'hostCol.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-column-cookies'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'cookiesCol.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-column-storage'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'usageCol.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-column-last-used'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'lastAccessedCol.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-remove-selected'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'removeSelected.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'removeSelected.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-button-cancel'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'cancel.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'cancel.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-button-save'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'save.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                            'save.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-removing-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        CONCAT(
-                            MESSAGE_REFERENCE('site-data-removing-header'),
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-removing-header'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                    'removingDialog1.title'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-removing-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                    'removingSelected1.description'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('site-data-removing-table'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/siteDataSettings.dtd',
-                    'siteTree3.label'
-                )
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1451992_preferences_translation.py
+++ /dev/null
@@ -1,185 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate import COPY, CONCAT
-
-def migrate(ctx):
-    """Bug 1451992 - Migrate Preferences::Subdialogs::Translation to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/translation.ftl',
-        'browser/browser/preferences/translation.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('translation-window'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('title'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'window.title'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('style'),
-                        CONCAT(
-                            FTL.TextElement('width: '),
-                            COPY(
-                                'browser/chrome/browser/preferences/translation.dtd',
-                                'window.width'
-                            )
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-close-key'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('key'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'windowClose.key'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-languages-disabled-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/translation.dtd',
-                    'noTranslationForLanguages2.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-languages-column'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'treehead.languageName.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-languages-button-remove'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeLanguage.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeLanguage.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-languages-button-remove-all'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeAllLanguages.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeAllLanguages.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-sites-disabled-desc'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/translation.dtd',
-                    'noTranslationForSites2.label'
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-sites-column'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'treehead.siteName2.label'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-sites-button-remove'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeSite.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeSite.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-sites-button-remove-all'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeAllSites.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'removeAllSites.accesskey'
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('translation-button-close'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'button.close.label'
-                        )
-                    ),
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/translation.dtd',
-                            'button.close.accesskey'
-                        )
-                    )
-                ]
-            )
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1453480_preferences_dom2_resources.py
+++ /dev/null
@@ -1,130 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-def migrate(ctx):
-    """Bug 1453480 - Migrate Fluent resources to use DOM Overlays, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('search-results-empty-message'),
-                value=FTL.Pattern(
-                    elements=[
-                        FTL.Placeable(
-                            expression=FTL.SelectExpression(
-                                expression=FTL.CallExpression(
-                                    callee=FTL.Function('PLATFORM')
-                                ),
-                                variants=[
-                                    FTL.Variant(
-                                        key=FTL.VariantName('windows'),
-                                        default=False,
-                                        value=REPLACE(
-                                            'browser/chrome/browser/preferences/preferences.properties',
-                                            'searchResults.sorryMessageWin',
-                                            {
-                                                '%S': FTL.TextElement('<span data-l10n-name="query"></span>')
-                                            }
-                                        )
-                                    ),
-                                    FTL.Variant(
-                                        key=FTL.VariantName('other'),
-                                        default=True,
-                                        value=REPLACE(
-                                            'browser/chrome/browser/preferences/preferences.properties',
-                                            'searchResults.sorryMessageUnix',
-                                            {
-                                                '%S': FTL.TextElement('<span data-l10n-name="query"></span>')
-                                            }
-                                        )
-                                    )
-                                ]
-                            )
-                        )
-                    ]
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('search-results-help-link'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'searchResults.needHelp3',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<a data-l10n-name="url">'),
-                            REPLACE(
-                                'browser/chrome/browser/preferences/preferences.properties',
-                                'searchResults.needHelpSupportLink',
-                                {
-                                    '%S': MESSAGE_REFERENCE('-brand-short-name'),
-                                }
-                            ),
-                            FTL.TextElement('</a>')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('update-application-version'),
-                value=CONCAT(
-                    COPY(
-                        'browser/chrome/browser/preferences/advanced.dtd',
-                        'updateApplication.version.pre'
-                    ),
-                    EXTERNAL_ARGUMENT('version'),
-                    COPY(
-                        'browser/chrome/browser/preferences/advanced.dtd',
-                        'updateApplication.version.post'
-                    ),
-                    FTL.TextElement(' <a data-l10n-name="learn-more">'),
-                    COPY(
-                        'browser/chrome/browser/aboutDialog.dtd',
-                        'releaseNotes.link'
-                    ),
-                    FTL.TextElement('</a>')
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('performance-limit-content-process-blocked-desc'),
-                value=CONCAT(
-                    REPLACE(
-                        'browser/chrome/browser/preferences/advanced.dtd',
-                        'limitContentProcessOption.disabledDescription',
-                        {
-                            '&brandShortName;': MESSAGE_REFERENCE('-brand-short-name')
-                        }
-                    ),
-                    FTL.TextElement(' <a data-l10n-name="learn-more">'),
-                    COPY(
-                        'browser/chrome/browser/preferences/advanced.dtd',
-                        'limitContentProcessOption.disabledDescriptionLink'
-                    ),
-                    FTL.TextElement('</a>')
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('tracking-desc'),
-                value=CONCAT(
-                    COPY(
-                        'browser/chrome/browser/preferences/privacy.dtd',
-                        'trackingProtection3.description'
-                    ),
-                    FTL.TextElement(' <a data-l10n-name="learn-more">'),
-                    COPY(
-                        'browser/chrome/browser/preferences/privacy.dtd',
-                        'trackingProtectionLearnMore2.label'
-                    ),
-                    FTL.TextElement('</a>')
-                )
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1453540_preferences_remaining_dtd.py
+++ /dev/null
@@ -1,140 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.transforms import REPLACE
-from fluent.migrate.helpers import MESSAGE_REFERENCE
-from fluent.migrate import COPY, CONCAT
-
-
-# Custom extension of the CONCAT migration tailored to concat
-# two strings separated by a placeable.
-class CONCAT_BEFORE_AFTER(CONCAT):
-    def __call__(self, ctx):
-        assert len(self.elements) == 3
-        pattern_before, middle, pattern_after = self.elements
-        elem_before = pattern_before.elements[0]
-        elem_after = pattern_after.elements[0]
-
-        if isinstance(elem_before, FTL.TextElement) and \
-           len(elem_before.value) > 0 and \
-           elem_before.value[-1] != " ":
-            elem_before.value += " "
-        if isinstance(elem_after, FTL.TextElement) and \
-           len(elem_after.value) > 0 and \
-           elem_after.value[0] != " ":
-            elem_after.value = " " + elem_after.value
-        return super(CONCAT_BEFORE_AFTER, self).__call__(ctx)
-
-def migrate(ctx):
-    """Bug 1453540 - Migrate remaining DTDs in Preferences to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('translate-attribution'),
-                value=CONCAT_BEFORE_AFTER(
-                    COPY(
-                        'browser/chrome/browser/preferences/content.dtd',
-                        'translation.options.attribution.beforeLogo',
-                    ),
-                    FTL.TextElement('<img data-l10n-name="logo"/>'),
-                    COPY(
-                        'browser/chrome/browser/preferences/content.dtd',
-                        'translation.options.attribution.afterLogo',
-                    ),
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('sync-mobile-promo'),
-                value=CONCAT(
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'mobilePromo3.start',
-                    ),
-                    FTL.TextElement('<img data-l10n-name="android-icon"/> <a data-l10n-name="android-link">'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'mobilePromo3.androidLink',
-                    ),
-                    FTL.TextElement('</a>'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'mobilePromo3.iOSBefore',
-                    ),
-                    FTL.TextElement('<img data-l10n-name="ios-icon"/> <a data-l10n-name="ios-link">'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'mobilePromo3.iOSLink',
-                    ),
-                    FTL.TextElement('</a>'),
-                    COPY(
-                        'browser/chrome/browser/preferences/sync.dtd',
-                        'mobilePromo3.end',
-                    ),
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-label'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/privacy.dtd',
-                    'historyHeader2.pre.label',
-                    {
-                        '&brandShortName;': MESSAGE_REFERENCE(
-                            '-brand-short-name'
-                        )
-                    }
-                ),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('accesskey'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'historyHeader2.pre.accesskey',
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-option-all'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'historyHeader.remember.label',
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-option-never'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'historyHeader.dontremember.label',
-                        )
-                    )
-                ]
-            ),
-            FTL.Message(
-                id=FTL.Identifier('history-remember-option-custom'),
-                attributes=[
-                    FTL.Attribute(
-                        FTL.Identifier('label'),
-                        COPY(
-                            'browser/chrome/browser/preferences/privacy.dtd',
-                            'historyHeader.custom.label',
-                        )
-                    )
-                ]
-            ),
-        ]
-    )
deleted file mode 100644
--- a/python/l10n/fluent_migrations/bug_1453800_container_removal.py
+++ /dev/null
@@ -1,56 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import EXTERNAL_ARGUMENT
-from fluent.migrate import COPY
-from fluent.migrate.transforms import PLURALS, REPLACE_IN_TEXT
-
-
-def migrate(ctx):
-    """Bug 1453800 - Migrate Container removal strings to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('containers-remove-alert-title'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'removeContainerAlertTitle',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-remove-alert-msg'),
-                value=PLURALS(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'removeContainerMsg',
-                    EXTERNAL_ARGUMENT('count'),
-                    lambda text: REPLACE_IN_TEXT(
-                        text,
-                        {
-                            '#S': EXTERNAL_ARGUMENT('count')
-                        }
-                    )
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-remove-ok-button'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'removeContainerOkButton',
-                ),
-            ),
-            FTL.Message(
-                id=FTL.Identifier('containers-remove-cancel-button'),
-                value=COPY(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'removeContainerButton2',
-                ),
-            ),
-        ]
-    )