--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -584,33 +584,16 @@ html|span.ac-emphasize-text-url {
   border-top: 1px solid GrayText;
 }
 
 /* Popup blocker button */
 #page-report-button {
   list-style-image: url("chrome://browser/skin/Info.png");
 }
 
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover,
-#reader-mode-button[readeractive]:hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button:hover:active,
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
 /* Bookmarking panel */
 #editBookmarkPanelStarIcon {
   list-style-image: url("chrome://browser/skin/places/starred48.png");
   width: 48px;
   height: 48px;
 }
 
 #editBookmarkPanelStarIcon[unstarred] {

--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -606,31 +606,16 @@ html|span.ac-emphasize-text-url {
   }
 
   #page-report-button:hover:active,
   #page-report-button[open="true"] {
     -moz-image-region: rect(0, 64px, 32px, 32px);
   }
 }
 
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover:active {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
 /* BOOKMARKING PANEL */
 #editBookmarkPanelStarIcon {
   list-style-image: url("chrome://browser/skin/places/starred48.png");
   width: 48px;
   height: 48px;
 }
 
 #editBookmarkPanelStarIcon[unstarred] {

deleted file mode 100644
--- a/browser/themes/shared/addons/addon-install-anchor.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     class="fieldtext"
-     width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <defs>
-    <path id="shape-notifications-addons" d="M10,15c0.5,0,1-0.4,1-1v-3c0,0,0-0.8,0.8-0.8c0.6,0,0.6,0.8,1.8,0.8c0.6,0,1.5-0.2,1.5-2c0-1.8-0.9-2-1.5-2 c-1.1,0-1.1,0.7-1.8,0.7C11,7.7,11,7,11,7V6c0-0.6-0.5-1-1-1H8c0,0-0.8,0-0.8-0.8C7.2,3.6,8,3.6,8,2.5C8,1.9,7.8,1,6,1 C4.2,1,4,1.9,4,2.5c0,1.1,0.8,1.1,0.8,1.8C4.8,5,4,5,4,5H2C1.5,5,1,5.4,1,6l0,1.5c0,0-0.1,1,1.1,1c0.8,0,0.9-1,1.9-1 C4.5,7.4,5,8,5,9c0,1-0.5,1.6-1,1.6c-1,0-1.1-1.1-1.9-1.1C0.9,9.5,1,10.8,1,10.8V14c0,0.6,0.5,1,1,1l2.6,0c0,0,1.1,0,1.1-1 c0-0.8-1-0.1-1-1.1c0-0.5,0.7-1.2,1.8-1.2s1.8,0.7,1.8,1.2c0,1-1.1,0.3-1.1,1.1c0,1,1.2,1,1.2,1H10z"/>
-  </defs>
-  <use xlink:href="#shape-notifications-addons"/>
-</svg>

--- a/browser/themes/shared/icons/feed.svg
+++ b/browser/themes/shared/icons/feed.svg
@@ -1,6 +1,6 @@
 <!-- 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/. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M14.3 15h-1.5a.789.789 0 0 1-.8-.8s.3-3.6-3.2-7.2c-2.5-3-7-3.2-7-3.2a.713.713 0 0 1-.8-.7V1.7a.713.713 0 0 1 .8-.7s6.3.4 9.6 4.5c3.3 3.1 3.6 8.8 3.6 8.8a.632.632 0 0 1-.7.7zM1.8 6s3.7.5 5.8 2.4c2.1 2 2.5 5.9 2.5 5.9 0 .4-.1.8-.5.8H8.1c-.4 0-.6-.3-.6-.8a5.929 5.929 0 0 0-1.8-4.2 7.256 7.256 0 0 0-3.9-1.4A.713.713 0 0 1 1 8V6.7a.713.713 0 0 1 .8-.7zM3 11a2 2 0 1 1-2 2 2.006 2.006 0 0 1 2-2z"/>
+  <path fill="context-fill" d="M3.5 10A2.5 2.5 0 1 0 6 12.5 2.5 2.5 0 0 0 3.5 10zM2 1a1 1 0 0 0 0 2 10.883 10.883 0 0 1 11 11 1 1 0 0 0 2 0A12.862 12.862 0 0 0 2 1zm0 4a1 1 0 0 0 0 2 6.926 6.926 0 0 1 7 7 1 1 0 0 0 2 0 8.9 8.9 0 0 0-9-9z"/>
 </svg>

--- a/browser/themes/shared/icons/find.svg
+++ b/browser/themes/shared/icons/find.svg
@@ -1,6 +1,6 @@
 <!-- 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/. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M9.5 1A5.549 5.549 0 0 0 4 6.5a5.291 5.291 0 0 0 .9 3L1.3 13a1.217 1.217 0 0 0 0 1.6 1.2 1.2 0 0 0 .8.4 1.33 1.33 0 0 0 .8-.3l3.5-3.5a5.291 5.291 0 0 0 3 .9A5.551 5.551 0 0 0 9.5 1zm0 9A3.543 3.543 0 0 1 6 6.5a3.5 3.5 0 0 1 7 0A3.543 3.543 0 0 1 9.5 10z"/>
+  <path fill="context-fill" d="M15.707 14.293l-4.822-4.822a6.019 6.019 0 1 0-1.414 1.414l4.822 4.822a1 1 0 0 0 1.414-1.414zM6 10a4 4 0 1 1 4-4 4 4 0 0 1-4 4z"/>
 </svg>

deleted file mode 100755
--- a/browser/themes/shared/icons/fullscreen-enter.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M7.707 8.293a1 1 0 0 0-1.414 0L3 11.586V9a1 1 0 0 0-2 0v5a1 1 0 0 0 1 1h5a1 1 0 1 0 0-2H4.414l3.293-3.293a1 1 0 0 0 0-1.414zM14 1H9a1 1 0 0 0 0 2h2.586L8.293 6.293a1 1 0 1 0 1.414 1.414L13 4.414V7a1 1 0 0 0 2 0V2a1 1 0 0 0-1-1z"/>
-</svg>

--- a/browser/themes/shared/icons/fullscreen.svg
+++ b/browser/themes/shared/icons/fullscreen.svg
@@ -1,6 +1,6 @@
 <!-- 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/. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M12 11V5l3 3zm-7 1h6l-3 3zm5-1H6a.945.945 0 0 1-1-1V6a.945.945 0 0 1 1-1h4a.945.945 0 0 1 1 1v4a1 1 0 0 1-1 1zm0-3a.945.945 0 0 0-1-1H7a.945.945 0 0 0-1 1v1a.945.945 0 0 0 1 1h2a.945.945 0 0 0 1-1zM8 1l3 3H5zM4 5v6L1 8z"/>
+  <path fill="context-fill" d="M7.707 8.293a1 1 0 0 0-1.414 0L3 11.586V9a1 1 0 0 0-2 0v5a1 1 0 0 0 1 1h5a1 1 0 1 0 0-2H4.414l3.293-3.293a1 1 0 0 0 0-1.414zM14 1H9a1 1 0 0 0 0 2h2.586L8.293 6.293a1 1 0 1 0 1.414 1.414L13 4.414V7a1 1 0 0 0 2 0V2a1 1 0 0 0-1-1z"/>
 </svg>

--- a/browser/themes/shared/icons/settings.svg
+++ b/browser/themes/shared/icons/settings.svg
@@ -1,6 +1,6 @@
 <!-- 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/. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M11.4 13.7l-.6-1.5c.3-.2.5-.4.8-.6.2-.2.4-.5.6-.7l1.5.6c.3.1.5 0 .7-.3l.4-.9c.1-.3 0-.5-.3-.7L12.9 9a6.054 6.054 0 0 0 0-1.9l1.5-.6a.517.517 0 0 0 .3-.7l-.4-.9a.517.517 0 0 0-.7-.3l-1.5.6a1.874 1.874 0 0 0-.6-.7c-.2-.2-.5-.4-.7-.6l.6-1.5c.1-.3 0-.5-.3-.7l-.9-.4c-.3-.1-.5 0-.7.3L9 3.1a6.054 6.054 0 0 0-1.9 0l-.6-1.5a.517.517 0 0 0-.7-.3l-.9.4a.61.61 0 0 0-.3.7l.6 1.5a1.874 1.874 0 0 0-.7.6 4.349 4.349 0 0 0-.6.7l-1.5-.7c-.3-.1-.5 0-.7.3l-.3.9a.574.574 0 0 0 .2.7l1.5.6a6.054 6.054 0 0 0 0 1.9l-1.5.6a.517.517 0 0 0-.3.7l.4.9a.517.517 0 0 0 .7.3l1.5-.6a1.874 1.874 0 0 0 .6.7c.2.2.5.4.7.6l-.6 1.5c-.1.3 0 .5.3.7l.9.4c.3.1.5 0 .7-.3l.5-1.5a6.054 6.054 0 0 0 1.9 0l.6 1.5a.517.517 0 0 0 .7.3l.9-.4c.2-.1.4-.4.3-.6zm-5-4.1a2.263 2.263 0 1 1 3.2-3.2 2.263 2.263 0 0 1-3.2 3.2z"/>
+  <path fill="context-fill" d="M15 7h-2.1a4.967 4.967 0 0 0-.732-1.753l1.49-1.49a1 1 0 0 0-1.414-1.414l-1.49 1.49A4.968 4.968 0 0 0 9 3.1V1a1 1 0 0 0-2 0v2.1a4.968 4.968 0 0 0-1.753.732l-1.49-1.49a1 1 0 0 0-1.414 1.415l1.49 1.49A4.967 4.967 0 0 0 3.1 7H1a1 1 0 0 0 0 2h2.1a4.968 4.968 0 0 0 .737 1.763c-.014.013-.032.017-.045.03l-1.45 1.45a1 1 0 1 0 1.414 1.414l1.45-1.45c.013-.013.018-.031.03-.045A4.968 4.968 0 0 0 7 12.9V15a1 1 0 0 0 2 0v-2.1a4.968 4.968 0 0 0 1.753-.732l1.49 1.49a1 1 0 0 0 1.414-1.414l-1.49-1.49A4.967 4.967 0 0 0 12.9 9H15a1 1 0 0 0 0-2zM5 8a3 3 0 1 1 3 3 3 3 0 0 1-3-3z"/>
 </svg>

new file mode 100644
--- /dev/null
+++ b/browser/themes/shared/icons/window.svg
@@ -0,0 +1,6 @@
+<!-- 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/. -->
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <path fill="context-fill" d="M13 1H3a3 3 0 0 0-3 3v8a3 3 0 0 0 3 3h11a2 2 0 0 0 2-2V4a3 3 0 0 0-3-3zm1 11a1 1 0 0 1-1 1H3a1 1 0 0 1-1-1V6h12zm0-7H2V4a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1z"/>
+</svg>

--- a/browser/themes/shared/icons/zoom-in.svg
+++ b/browser/themes/shared/icons/zoom-in.svg
@@ -1,6 +1,7 @@
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M13 9H9v4H7V9H3V7h4V3h2v4h4z"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="context-fill">
+  <path d="M14 7H9V2a1 1 0 0 0-2 0v5H2a1 1 0 0 0 0 2h5v5a1 1 0 0 0 2 0V9h5a1 1 0 0 0 0-2z"/>
 </svg>
+

--- a/browser/themes/shared/icons/zoom-out.svg
+++ b/browser/themes/shared/icons/zoom-out.svg
@@ -1,6 +1,6 @@
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="M3 7h10v2H3z"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="context-fill">
+  <rect x="2" y="7" width="12" height="2" rx="1"/>
 </svg>

--- a/browser/themes/shared/identity-block/identity-block.inc.css
+++ b/browser/themes/shared/identity-block/identity-block.inc.css
@@ -105,17 +105,17 @@
   fill-opacity: .3;
 }
 
 #urlbar[actiontype="searchengine"] > #identity-box > #identity-icon {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg);
 }
 
 #urlbar[actiontype="extension"] > #identity-box > #identity-icon {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-anchor.svg);
+  list-style-image: url(chrome://mozapps/skin/extensions/extensionGeneric-16.svg);
 }
 
 /* SHARING ICON */
 
 #sharing-icon {
   width: 16px;
   height: 16px;
   margin-inline-start: -16px;

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -15,17 +15,16 @@
   skin/classic/browser/aboutWelcomeBack.css                    (../shared/aboutWelcomeBack.css)
   skin/classic/browser/addons/addon-install-blocked.svg        (../shared/addons/addon-install-blocked.svg)
   skin/classic/browser/addons/addon-install-confirm.svg        (../shared/addons/addon-install-confirm.svg)
   skin/classic/browser/addons/addon-install-downloading.svg    (../shared/addons/addon-install-downloading.svg)
   skin/classic/browser/addons/addon-install-error.svg          (../shared/addons/addon-install-error.svg)
   skin/classic/browser/addons/addon-install-installed.svg      (../shared/addons/addon-install-installed.svg)
   skin/classic/browser/addons/addon-install-restart.svg        (../shared/addons/addon-install-restart.svg)
   skin/classic/browser/addons/addon-install-warning.svg        (../shared/addons/addon-install-warning.svg)
-* skin/classic/browser/addons/addon-install-anchor.svg         (../shared/addons/addon-install-anchor.svg)
 * skin/classic/browser/controlcenter/conn-not-secure.svg       (../shared/controlcenter/conn-not-secure.svg)
 * skin/classic/browser/controlcenter/connection.svg            (../shared/controlcenter/connection.svg)
 * skin/classic/browser/controlcenter/mcb-disabled.svg          (../shared/controlcenter/mcb-disabled.svg)
   skin/classic/browser/controlcenter/extension.svg             (../shared/controlcenter/extension.svg)
 * skin/classic/browser/controlcenter/permissions.svg           (../shared/controlcenter/permissions.svg)
 * skin/classic/browser/controlcenter/tracking-protection.svg   (../shared/controlcenter/tracking-protection.svg)
   skin/classic/browser/controlcenter/warning-gray.svg          (../shared/controlcenter/warning-gray.svg)
   skin/classic/browser/controlcenter/warning-yellow.svg        (../shared/controlcenter/warning-yellow.svg)
@@ -144,17 +143,16 @@
   skin/classic/browser/edit-cut.svg                   (../shared/icons/edit-cut.svg)
   skin/classic/browser/edit-paste.svg                 (../shared/icons/edit-paste.svg)
   skin/classic/browser/email-link.svg                 (../shared/icons/email-link.svg)
   skin/classic/browser/feed.svg                       (../shared/icons/feed.svg)
   skin/classic/browser/find.svg                       (../shared/icons/find.svg)
   skin/classic/browser/forget.svg                     (../shared/icons/forget.svg)
   skin/classic/browser/forward.svg                    (../shared/icons/forward.svg)
   skin/classic/browser/fullscreen.svg                 (../shared/icons/fullscreen.svg)
-  skin/classic/browser/fullscreen-enter.svg           (../shared/icons/fullscreen-enter.svg)
   skin/classic/browser/fullscreen-exit.svg            (../shared/icons/fullscreen-exit.svg)
   skin/classic/browser/history.svg                    (../shared/icons/history.svg)
   skin/classic/browser/home.svg                       (../shared/icons/home.svg)
   skin/classic/browser/library.svg                    (../shared/icons/library.svg)
   skin/classic/browser/library-bookmark-animation.svg (../shared/icons/library-bookmark-animation.svg)
   skin/classic/browser/link.svg                       (../shared/icons/link.svg)
   skin/classic/browser/mail.svg                       (../shared/icons/mail.svg)
   skin/classic/browser/menu.svg                       (../shared/icons/menu.svg)
@@ -172,16 +170,17 @@
   skin/classic/browser/sidebars.svg                   (../shared/icons/sidebars.svg)
   skin/classic/browser/sidebars-right.svg             (../shared/icons/sidebars-right.svg)
   skin/classic/browser/stop.svg                       (../shared/icons/stop.svg)
   skin/classic/browser/stop-to-reload.svg             (../shared/icons/stop-to-reload.svg)
   skin/classic/browser/sync.svg                       (../shared/icons/sync.svg)
   skin/classic/browser/synced-tabs.svg                (../shared/icons/synced-tabs.svg)
   skin/classic/browser/toolbar.svg                    (../shared/icons/toolbar.svg)
   skin/classic/browser/webIDE.svg                     (../shared/icons/webIDE.svg)
+  skin/classic/browser/window.svg                     (../shared/icons/window.svg)
   skin/classic/browser/zoom-in.svg                    (../shared/icons/zoom-in.svg)
   skin/classic/browser/zoom-out.svg                   (../shared/icons/zoom-out.svg)
 
 
   skin/classic/browser/search-indicator.png                    (../shared/search/search-indicator.png)
   skin/classic/browser/search-indicator@2x.png                 (../shared/search/search-indicator@2x.png)
   skin/classic/browser/search-engine-placeholder.png           (../shared/search/search-engine-placeholder.png)
   skin/classic/browser/search-engine-placeholder@2x.png        (../shared/search/search-engine-placeholder@2x.png)

--- a/browser/themes/shared/menupanel.inc.css
+++ b/browser/themes/shared/menupanel.inc.css
@@ -1,11 +1,10 @@
 /* Menu panel and palette styles */
 
-#appMenuRecentlyClosedWindows,
 #appMenu-new-window-button {
   list-style-image: url(chrome://browser/skin/new-window.svg);
 }
 
 #appMenu-private-window-button {
   list-style-image: url(chrome://browser/skin/privateBrowsing.svg);
 }
 
@@ -58,17 +57,17 @@
   list-style-image: url(chrome://browser/skin/zoom-in.svg);
 }
 
 #appMenu-zoomReduce-button {
   list-style-image: url(chrome://browser/skin/zoom-out.svg);
 }
 
 #appMenu-fullscreen-button {
-  list-style-image: url(chrome://browser/skin/fullscreen-enter.svg);
+  list-style-image: url(chrome://browser/skin/fullscreen.svg);
 }
 
 #appMenu-fullscreen-button[checked] {
   list-style-image: url(chrome://browser/skin/fullscreen-exit.svg);
 }
 
 #appMenu-library-history-button {
   list-style-image: url(chrome://browser/skin/history.svg);
@@ -118,8 +117,13 @@ toolbarpaletteitem[place="palette"] > #b
 
 #appMenuClearRecentHistory {
   list-style-image: url("chrome://browser/skin/forget.svg");
 }
 
 #appMenuRestoreLastSession {
   list-style-image: url("chrome://browser/skin/reload.svg");
 }
+
+#appMenuRecentlyClosedWindows {
+  list-style-image: url(chrome://browser/skin/window.svg);
+}
+

--- a/browser/themes/shared/notification-icons.inc.css
+++ b/browser/themes/shared/notification-icons.inc.css
@@ -170,17 +170,17 @@ html|*#webRTC-previewVideo {
   25% {transform: translateX(3px) }
   75% {transform: translateX(-3px) }
   100% { transform: translateX(0); }
 }
 
 /* INSTALL ADDONS */
 
 .install-icon {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-anchor.svg);
+  list-style-image: url(chrome://mozapps/skin/extensions/extensionGeneric-16.svg);
 }
 
 .popup-notification-icon[popupid="xpinstall-disabled"],
 .popup-notification-icon[popupid="addon-install-blocked"],
 .popup-notification-icon[popupid="addon-install-origin-blocked"] {
   list-style-image: url(chrome://browser/skin/addons/addon-install-blocked.svg);
 }
 

deleted file mode 100644
index 12e2fd991a6cb24b8f5a906b31a70690e128c295..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

deleted file mode 100644
index 236f52d8fe46788a860a963f9bdaa6e680af67ea..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

--- a/browser/themes/shared/reader/readerMode.svg
+++ b/browser/themes/shared/reader/readerMode.svg
@@ -1,29 +1,6 @@
-<?xml version="1.0" encoding="utf-8"?>
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="48" height="16" viewBox="0 0 48 16">
-  <defs>
-    <path id="glyphShape-readerMode-book" d="M5.5,5h-2C3.2,5,3,5.2,3,5.5S3.2,6,3.5,6h2 C5.8,6,6,5.8,6,5.5S5.8,5,5.5,5z M5.5,7h-2C3.2,7,3,7.2,3,7.5S3.2,8,3.5,8h2C5.8,8,6,7.8,6,7.5S5.8,7,5.5,7z M5.5,9h-2 C3.2,9,3,9.2,3,9.5S3.2,10,3.5,10h2C5.8,10,6,9.8,6,9.5S5.8,9,5.5,9z M15.4,2c0,0-3.1,0-4.4,0S8.1,2.5,8,4.3C7.9,2.5,6.3,2,5,2 S0.6,2,0.6,2C0.3,2,0,2.3,0,2.7v9.6C0,12.6,0.3,13,0.6,13c0,0,2.6,0,4.4,0c1.6,0,2.8,1,3,2.3C8.2,14,9.4,13,11,13 c1.8,0,4.4,0,4.4,0c0.4,0,0.6-0.4,0.6-0.8V2.7C16,2.3,15.7,2,15.4,2z M14,11L14,11c-0.2,0-1.6,0-3,0c-1.6,0-2.9,0.8-3,2.2 C7.9,11.8,6.6,11,5,11c-1.4,0-2.8,0-3,0l0,0l0,0V4c0,0,2.7,0,3.5,0C6.6,4,8,5.5,8,6.8C8,5.5,9.4,4,10.5,4C11.3,4,14,4,14,4V11 L14,11z"/>
-    <linearGradient id="gradient-state-default" x1="0%" y1="0%" x2="0" y2="100%">
-      <stop stop-color="#989898" offset="0%"/>
-      <stop stop-color="#808080" offset="100%"/>
-    </linearGradient>
-    <linearGradient id="gradient-state-hover" x1="0%" y1="0%" x2="0" y2="100%">
-      <stop stop-color="#24aef4" offset="0%"/>
-      <stop stop-color="#177bdb" offset="100%"/>
-    </linearGradient>
-    <linearGradient id="gradient-state-pressed" x1="0%" y1="0%" x2="0" y2="100%">
-      <stop stop-color="#ff9300" offset="0%"/>
-      <stop stop-color="#ff5500" offset="100%"/>
-    </linearGradient>
-    <style>
-      .icon-state-default { fill: url(#gradient-state-default); }
-      .icon-state-hover   { fill: url(#gradient-state-hover); }
-      .icon-state-pressed { fill: url(#gradient-state-pressed); }
-    </style>
-  </defs>
-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-default"/>
-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-hover" transform="translate(16)"/>
-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-pressed" transform="translate(32)"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16">
+  <path fill="context-fill" fill-opacity="context-fill-opacity" d="M13 0H3a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2zm0 13a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V3a1 1 0 0 1 1-1h8a1 1 0 0 1 1 1zm-2.5-9h-5a.5.5 0 0 0 0 1h5a.5.5 0 0 0 0-1zm0 2h-5a.5.5 0 0 0 0 1h5a.5.5 0 1 0 0-1zm0 2h-5a.5.5 0 0 0 0 1h5a.5.5 0 1 0 0-1zm-3 2h-2a.5.5 0 0 0 0 1h2a.5.5 0 1 0 0-1z"/>
 </svg>

--- a/browser/themes/shared/urlbar-searchbar.inc.css
+++ b/browser/themes/shared/urlbar-searchbar.inc.css
@@ -120,16 +120,18 @@
 #urlbar[switchingtabs] > .urlbar-textbox-container > .urlbar-history-dropmarker {
   transition: none;
 }
 
 #navigator-toolbox:not(:hover) > #nav-bar:not([customizing="true"]) > #nav-bar-customization-target > #urlbar-container > #urlbar:not([focused]) > .urlbar-textbox-container > .urlbar-history-dropmarker {
   opacity: 0;
 }
 
+/* Page actions */
+
 #page-action-buttons {
   -moz-box-align: center;
   /* Add more space between the last icon and the urlbar's edge. */
   margin-inline-end: 3px;
 }
 
 .urlbar-icon {
   padding: 0 6px;
@@ -215,17 +217,29 @@
   -moz-context-properties: fill, stroke;
   stroke: var(--toolbarbutton-icon-fill-attention);
 }
 
 #star-button-box[animationsenabled] > #star-button[starred][animate]:-moz-locale-dir(rtl) + #star-button-animatable-box > #star-button-animatable-image {
   animation-name: bookmark-animation-rtl;
 }
 
+/* Reader mode icon */
+
+#reader-mode-button {
+  list-style-image: url(chrome://browser/skin/readerMode.svg);
+}
+
+#reader-mode-button[readeractive] {
+  fill: var(--toolbarbutton-icon-fill-attention);
+  fill-opacity: 1;
+}
+
 /* Zoom button */
+
 #urlbar-zoom-button {
   margin: 0 3px;
   font-size: .8em;
   padding: 0 8px;
   border-radius: 1em;
   background-color: hsla(0,0%,0%,.05);
   border: 1px solid ThreeDLightShadow;
 }

--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -779,33 +779,16 @@ treechildren.searchbar-treebody::-moz-tr
   -moz-image-region: rect(0, 32px, 16px, 16px);
 }
 
 #page-report-button:hover:active,
 #page-report-button[open="true"] {
   -moz-image-region: rect(0, 48px, 16px, 32px);
 }
 
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover,
-#reader-mode-button[readeractive]:hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button:hover:active,
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
 /* bookmarking panel */
 
 #editBookmarkPanelStarIcon {
   list-style-image: url("chrome://browser/skin/places/starred48.png");
   width: 48px;
   height: 48px;
 }
 

--- a/toolkit/themes/shared/extensions/utilities.svg
+++ b/toolkit/themes/shared/extensions/utilities.svg
@@ -1,7 +1,6 @@
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" d="m11.5,13.9l-.6-1.5c.3-.2 .5-.4 .8-.6 .2-.2 .4-.5 .6-.7l1.5,.6c.3,.1 .6,0 .7-.3l.4-1c.1-.3 0-.6-.3-.7l-1.5-.6c.1-.6 .1-1.3 0-2l1.5-.6c.3-.1 .4-.4 .3-.7l-.4-1c-.1-.3-.4-.4-.7-.3l-1.5,.6c-.2-.3-.4-.5-.6-.8-.2-.1-.5-.3-.7-.5l.6-1.5c.1-.3 0-.6-.3-.7l-.9-.4c-.3-.1-.6,0-.7,.3l-.6,1.5c-.6-.1-1.3-.1-2,0l-.6-1.5c-.1-.3-.4-.4-.7-.3l-1,.4c-.2,.1-.3,.4-.2,.6l.6,1.5c-.3,.3-.5,.5-.8,.7-.2,.3-.4,.5-.6,.8l-1.5-.7c-.3-.1-.6,0-.7,.3l-.4,.9c-.1,.3 0,.6 .3,.7l1.5,.7c-.1,.6-.1,1.3 0,1.9l-1.5,.6c-.3,.1-.4,.4-.3,.7l.4,1c.1,.3 .4,.4 .7,.3l1.5-.6c.2,.3 .4,.5 .6,.8 .2,.2 .5,.4 .7,.6l-.6,1.5c-.1,.3 0,.6 .3,.7l1,.4c.3,.1 .6,0 .7-.3l.6-1.5c.6,.1 1.3,.1 2,0l.6,1.5c.1,.3 .4,.4 .7,.3l1-.4c.1-.1 .3-.4 .1-.7zm-5.1-4.2c-.9-.9-.9-2.4 0-3.3 .9-.9 2.4-.9 3.3,0 .9,.9 .9,2.4 0,3.3-.9,.9-2.4,.9-3.3,0z"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16">
+  <path fill="context-fill" d="M15 7h-2.1a4.967 4.967 0 0 0-.732-1.753l1.49-1.49a1 1 0 0 0-1.414-1.414l-1.49 1.49A4.968 4.968 0 0 0 9 3.1V1a1 1 0 0 0-2 0v2.1a4.968 4.968 0 0 0-1.753.732l-1.49-1.49a1 1 0 0 0-1.414 1.415l1.49 1.49A4.967 4.967 0 0 0 3.1 7H1a1 1 0 0 0 0 2h2.1a4.968 4.968 0 0 0 .737 1.763c-.014.013-.032.017-.045.03l-1.45 1.45a1 1 0 1 0 1.414 1.414l1.45-1.45c.013-.013.018-.031.03-.045A4.968 4.968 0 0 0 7 12.9V15a1 1 0 0 0 2 0v-2.1a4.968 4.968 0 0 0 1.753-.732l1.49 1.49a1 1 0 0 0 1.414-1.414l-1.49-1.49A4.967 4.967 0 0 0 12.9 9H15a1 1 0 0 0 0-2zM5 8a3 3 0 1 1 3 3 3 3 0 0 1-3-3z"/>
 </svg>
-

--- a/toolkit/themes/shared/icons/find-next-arrow.svg
+++ b/toolkit/themes/shared/icons/find-next-arrow.svg
@@ -1,8 +1,6 @@
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="12" height="12" viewBox="0 0 12 12">
-  <path fill="context-fill" d="M5.547,8.255L0.538,3.53l1.239-1.265l3.77,3.641l3.719-3.641l1.264,1.188L5.547,8.255z"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <path fill="context-fill" d="M8 12a1 1 0 0 1-.707-.293l-5-5a1 1 0 0 1 1.414-1.414L8 9.586l4.293-4.293a1 1 0 0 1 1.414 1.414l-5 5A1 1 0 0 1 8 12z"/>
 </svg>
-

--- a/toolkit/themes/shared/icons/find-previous-arrow.svg
+++ b/toolkit/themes/shared/icons/find-previous-arrow.svg
@@ -1,8 +1,6 @@
 <!-- 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/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="12" height="12" viewBox="0 0 12 12">
-  <path fill="context-fill" d="M5.407,1.5l-5,4.599L1.65,7.283l3.757-3.387l3.705,3.385l1.296-1.158L5.407,1.5z"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <path fill="context-fill" d="M13 11a1 1 0 0 1-.707-.293L8 6.414l-4.293 4.293a1 1 0 0 1-1.414-1.414l5-5a1 1 0 0 1 1.414 0l5 5A1 1 0 0 1 13 11z"/>
 </svg>
-