--- a/mobile/android/chrome/jar.mn
+++ b/mobile/android/chrome/jar.mn
@@ -65,8 +65,43 @@ chrome.jar:
   content/WebcompatReporter.js         (content/WebcompatReporter.js)
 #endif
 
 % content branding %content/branding/
 
 % override chrome://global/content/config.xul chrome://browser/content/config.xhtml
 % override chrome://global/content/netError.xhtml chrome://browser/content/netError.xhtml
 % override chrome://mozapps/content/extensions/extensions.xul chrome://browser/content/aboutAddons.xhtml
+
+# These overrides are not locale specific and by putting them here,
+# we avoid duplication in the chrome.manifest. See bug 1286853
+
+% resource search-plugins chrome://browser/locale/searchplugins/
+
+% override chrome://global/locale/about.dtd chrome://browser/locale/overrides/about.dtd
+% override chrome://global/locale/aboutAbout.dtd chrome://browser/locale/overrides/aboutAbout.dtd
+% override chrome://global/locale/aboutReader.properties chrome://browser/locale/overrides/aboutReader.properties
+% override chrome://global/locale/aboutRights.dtd chrome://browser/locale/overrides/aboutRights.dtd
+% override chrome://global/locale/charsetMenu.properties chrome://browser/locale/overrides/charsetMenu.properties
+% override chrome://global/locale/commonDialogs.properties chrome://browser/locale/overrides/commonDialogs.properties
+% override chrome://mozapps/locale/handling/handling.properties chrome://browser/locale/handling.properties
+% override chrome://global/locale/intl.properties chrome://browser/locale/overrides/intl.properties
+% override chrome://global/locale/intl.css chrome://browser/locale/overrides/intl.css
+% override chrome://passwordmgr/locale/passwordmgr.properties chrome://browser/locale/overrides/passwordmgr/passwordmgr.properties
+% override chrome://global/locale/search/search.properties chrome://browser/locale/overrides/search/search.properties
+% override chrome://pluginproblem/locale/pluginproblem.dtd chrome://browser/locale/overrides/plugins/pluginproblem.dtd
+% override chrome://global/locale/aboutSupport.dtd chrome://browser/locale/overrides/global/aboutSupport.dtd
+% override chrome://global/locale/aboutSupport.properties chrome://browser/locale/overrides/global/aboutSupport.properties
+% override chrome://global/locale/crashes.dtd chrome://browser/locale/overrides/crashreporter/crashes.dtd
+% override chrome://global/locale/crashes.properties chrome://browser/locale/overrides/crashreporter/crashes.properties
+% override chrome://global/locale/mozilla.dtd chrome://browser/locale/overrides/global/mozilla.dtd
+% override chrome://global/locale/aboutTelemetry.dtd chrome://browser/locale/overrides/global/aboutTelemetry.dtd
+% override chrome://global/locale/aboutTelemetry.properties chrome://browser/locale/overrides/global/aboutTelemetry.properties
+% override chrome://global/locale/aboutWebrtc.properties chrome://browser/locale/overrides/global/aboutWebrtc.properties
+
+% override chrome://global/locale/global.dtd chrome://browser/locale/overrides/global.dtd
+% override chrome://global/locale/AccessFu.properties chrome://browser/locale/overrides/AccessFu.properties
+% override chrome://global/locale/dom/dom.properties chrome://browser/locale/overrides/dom/dom.properties
+% override chrome://global/locale/plugins.properties chrome://browser/locale/overrides/plugins.properties
+
+% override chrome://global/locale/netError.dtd    chrome://browser/locale/netError.dtd
+% override chrome://global/locale/appstrings.properties chrome://browser/locale/appstrings.properties
+% override chrome://passwordmgr/locale/passwordmgr.properties chrome://browser/locale/passwordmgr.properties

--- a/mobile/android/locales/jar.mn
+++ b/mobile/android/locales/jar.mn
@@ -1,13 +1,15 @@
 #filter substitution
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+# Do NOT add overrides into this file or they will be duplicated for all locales.
+# Use mobile/android/chrome/jar.mn.
 
 @AB_CD@.jar:
 % locale browser @AB_CD@ %locale/@AB_CD@/browser/
   locale/@AB_CD@/browser/about.dtd                (%chrome/about.dtd)
   locale/@AB_CD@/browser/aboutAccounts.dtd        (%chrome/aboutAccounts.dtd)
   locale/@AB_CD@/browser/aboutAccounts.properties (%chrome/aboutAccounts.properties)
   locale/@AB_CD@/browser/aboutAddons.dtd          (%chrome/aboutAddons.dtd)
   locale/@AB_CD@/browser/aboutAddons.properties   (%chrome/aboutAddons.properties)
@@ -29,17 +31,16 @@
   locale/@AB_CD@/browser/sync.properties          (%chrome/sync.properties)
   locale/@AB_CD@/browser/phishing.dtd             (%chrome/phishing.dtd)
   locale/@AB_CD@/browser/handling.properties      (%chrome/handling.properties)
   locale/@AB_CD@/browser/aboutLogins.dtd          (%chrome/aboutLogins.dtd)
   locale/@AB_CD@/browser/aboutLogins.properties  (%chrome/aboutLogins.properties)
 #ifndef RELEASE_OR_BETA
   locale/@AB_CD@/browser/webcompatReporter.properties (%chrome/webcompatReporter.properties)
 #endif
-% resource search-plugins chrome://browser/locale/searchplugins/
 
 # overrides for toolkit l10n, also for en-US
 # keep this file list in sync with filter.py
 relativesrcdir toolkit/locales:
   locale/@AB_CD@/browser/overrides/about.dtd                       (%chrome/global/about.dtd)
   locale/@AB_CD@/browser/overrides/aboutAbout.dtd                  (%chrome/global/aboutAbout.dtd)
   locale/@AB_CD@/browser/overrides/aboutReader.properties          (%chrome/global/aboutReader.properties)
   locale/@AB_CD@/browser/overrides/aboutRights.dtd                 (%chrome/global/aboutRights.dtd)
@@ -60,42 +61,16 @@ relativesrcdir toolkit/locales:
 #about:mozilla
   locale/@AB_CD@/browser/overrides/global/mozilla.dtd                (%chrome/global/mozilla.dtd)
 #about:telemetry
   locale/@AB_CD@/browser/overrides/global/aboutTelemetry.dtd         (%chrome/global/aboutTelemetry.dtd)
   locale/@AB_CD@/browser/overrides/global/aboutTelemetry.properties  (%chrome/global/aboutTelemetry.properties)
 #about:webrtc
   locale/@AB_CD@/browser/overrides/global/aboutWebrtc.properties  (%chrome/global/aboutWebrtc.properties)
 
-% override chrome://global/locale/about.dtd chrome://browser/locale/overrides/about.dtd
-% override chrome://global/locale/aboutAbout.dtd chrome://browser/locale/overrides/aboutAbout.dtd
-% override chrome://global/locale/aboutReader.properties chrome://browser/locale/overrides/aboutReader.properties
-% override chrome://global/locale/aboutRights.dtd chrome://browser/locale/overrides/aboutRights.dtd
-% override chrome://global/locale/charsetMenu.properties chrome://browser/locale/overrides/charsetMenu.properties
-% override chrome://global/locale/commonDialogs.properties chrome://browser/locale/overrides/commonDialogs.properties
-% override chrome://mozapps/locale/handling/handling.properties chrome://browser/locale/handling.properties
-% override chrome://global/locale/intl.properties chrome://browser/locale/overrides/intl.properties
-% override chrome://global/locale/intl.css chrome://browser/locale/overrides/intl.css
-% override chrome://passwordmgr/locale/passwordmgr.properties chrome://browser/locale/overrides/passwordmgr/passwordmgr.properties
-% override chrome://global/locale/search/search.properties chrome://browser/locale/overrides/search/search.properties
-% override chrome://pluginproblem/locale/pluginproblem.dtd chrome://browser/locale/overrides/plugins/pluginproblem.dtd
-% override chrome://global/locale/aboutSupport.dtd chrome://browser/locale/overrides/global/aboutSupport.dtd
-% override chrome://global/locale/aboutSupport.properties chrome://browser/locale/overrides/global/aboutSupport.properties
-% override chrome://global/locale/crashes.dtd chrome://browser/locale/overrides/crashreporter/crashes.dtd
-% override chrome://global/locale/crashes.properties chrome://browser/locale/overrides/crashreporter/crashes.properties
-% override chrome://global/locale/mozilla.dtd chrome://browser/locale/overrides/global/mozilla.dtd
-% override chrome://global/locale/aboutTelemetry.dtd chrome://browser/locale/overrides/global/aboutTelemetry.dtd
-% override chrome://global/locale/aboutTelemetry.properties chrome://browser/locale/overrides/global/aboutTelemetry.properties
-% override chrome://global/locale/aboutWebrtc.properties chrome://browser/locale/overrides/global/aboutWebrtc.properties
-
 # overrides for dom l10n, also for en-US
 # keep this file list in sync with filter.py
 relativesrcdir dom/locales:
   locale/@AB_CD@/browser/overrides/global.dtd                  (%chrome/global.dtd)
   locale/@AB_CD@/browser/overrides/AccessFu.properties         (%chrome/accessibility/AccessFu.properties)
   locale/@AB_CD@/browser/overrides/dom/dom.properties          (%chrome/dom/dom.properties)
 #about:plugins
   locale/@AB_CD@/browser/overrides/plugins.properties          (%chrome/plugins.properties)
-
-% override chrome://global/locale/global.dtd chrome://browser/locale/overrides/global.dtd
-% override chrome://global/locale/AccessFu.properties chrome://browser/locale/overrides/AccessFu.properties
-% override chrome://global/locale/dom/dom.properties chrome://browser/locale/overrides/dom/dom.properties
-% override chrome://global/locale/plugins.properties chrome://browser/locale/overrides/plugins.properties

--- a/mobile/locales/jar.mn
+++ b/mobile/locales/jar.mn
@@ -1,17 +1,16 @@
 #filter substitution
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+# Do NOT add overrides into this file or they will be duplicated for all locales.
+# Use mobile/android/chrome/jar.mn.
 
 @AB_CD@.jar:
 % locale browser @AB_CD@ %locale/@AB_CD@/browser/
   locale/@AB_CD@/browser/region.properties        (%chrome/region.properties)
 
 # Fennec-specific overrides of generic strings
   locale/@AB_CD@/browser/netError.dtd             (%overrides/netError.dtd)
-% override chrome://global/locale/netError.dtd    chrome://browser/locale/netError.dtd
   locale/@AB_CD@/browser/appstrings.properties    (%overrides/appstrings.properties)
-% override chrome://global/locale/appstrings.properties chrome://browser/locale/appstrings.properties
   locale/@AB_CD@/browser/passwordmgr.properties    (%overrides/passwordmgr.properties)
-% override chrome://passwordmgr/locale/passwordmgr.properties chrome://browser/locale/passwordmgr.properties