Merge branch 'master' into master

43 files changed, 451 insertions, 488 deletions

diff --git a/arc-firefox-theme/chrome/browser/Security-broken.png b/arc-firefox-theme/chrome/browser/Security-broken.png
deleted file mode 100644
index 1ec110b..0000000
--- a/arc-firefox-theme/chrome/browser/Security-broken.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/aboutNetError.css b/arc-firefox-theme/chrome/browser/aboutNetError.css
index c0b76aa..3dd6f50 100644
--- a/arc-firefox-theme/chrome/browser/aboutNetError.css
+++ b/arc-firefox-theme/chrome/browser/aboutNetError.css
@@ -126,10 +126,6 @@ span#hostname {
 
 #automaticallyReportInFuture {
   cursor: pointer;
-  display: inline-block;
-  padding-inline-start: 2.3em;
-  text-indent: -2.3em;
-  line-height: 16px
 }
 
 #errorCode:not([href]) {
diff --git a/arc-firefox-theme/chrome/browser/aboutSyncTabs.css b/arc-firefox-theme/chrome/browser/aboutSyncTabs.css
index 4cedad6..18e2154 100644
--- a/arc-firefox-theme/chrome/browser/aboutSyncTabs.css
+++ b/arc-firefox-theme/chrome/browser/aboutSyncTabs.css
@@ -26,6 +26,10 @@
   margin-inline-end: 2em;
 }
 
+#headers:-moz-locale-dir(rtl) {
+  background-position-x: 100%;
+}
+
 #tabsListHeading {
   font-size: 140%;
   font-weight: bold;
diff --git a/arc-firefox-theme/chrome/browser/actionicon-tab.png b/arc-firefox-theme/chrome/browser/actionicon-tab.png
deleted file mode 100644
index 433c25e..0000000
--- a/arc-firefox-theme/chrome/browser/actionicon-tab.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/addons/addon-badge.svg b/arc-firefox-theme/chrome/browser/addons/addon-badge.svg
new file mode 100644
index 0000000..5a62add
--- /dev/null
+++ b/arc-firefox-theme/chrome/browser/addons/addon-badge.svg
@@ -0,0 +1,19 @@
+<?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 version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10">
+<style type="text/css">
+path {
+  stroke: #bb3817;
+  fill: #FFFFFF;
+}
+</style>
+<path d="M6.6,9c0.3,0,0.5-0.3,0.6-0.6C7,7.7,7,6.9,7.1,6.2c0.1-0.3,0.3-0.4,0.6-0.4c0.3,0,0.3,0.4,1,0.4
+        c0.3,0,0.8-0.1,0.8-1.1S9,3.9,8.7,3.9c-0.6,0-0.7,0.5-1,0.5c-0.3,0-0.5-0.2-0.6-0.5c0-0.3,0-0.7,0-1c0-0.3-0.2-0.5-0.5-0.6
+        c0,0,0,0-0.1,0c-0.5,0-1,0.1-1.6,0C4.7,2.3,4.5,2.1,4.6,1.8c0-0.4,0.4-0.3,0.4-1C5,0.5,4.9,0,3.8,0S2.7,0.5,2.7,0.8
+        c0,0.6,0.5,0.7,0.5,1c0,0.3-0.2,0.5-0.5,0.5C2.1,2.4,1.6,2.4,1,2.4c-0.3,0-0.5,0.2-0.6,0.5c0,0,0,0,0,0.1v0.7c0,0-0.1,0.8,0.6,0.8
+        C1.5,4.5,1.6,4,2.2,4c0.3,0,0.7,0.7,0.7,1.3S2.4,6.6,2.2,6.6C1.6,6.6,1.5,6,1.1,6C0.4,5.9,0.5,6.7,0.5,6.7v1.7C0.4,8.7,0.7,9,1,9
+        c0,0,0,0,0,0h2.1C3.1,9,4,9,4,8.4c0-0.4-0.7-0.6-0.7-1.2C3.5,6.7,4,6.3,4.5,6.3c0.6,0,1.2,0.6,1.2,0.8c0,0.6-0.6,0.8-0.6,1.2
+        C5.1,9,5.9,9,5.9,9L6.6,9z"/>
+</svg>
diff --git a/arc-firefox-theme/chrome/browser/browser.css b/arc-firefox-theme/chrome/browser/browser.css
index 6ccccc4..e3de08a 100644
--- a/arc-firefox-theme/chrome/browser/browser.css
+++ b/arc-firefox-theme/chrome/browser/browser.css
@@ -760,7 +760,7 @@ toolbarpaletteitem[place="palette"] > :-moz-any(#back-button, #forward-button, #
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #home-button[cui-areatype="menu-panel"],
@@ -1153,6 +1153,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
   visibility: visible; }
@@ -1162,12 +1165,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-  visibility: visible; }
-
 #identity-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-black); }
 
@@ -1197,6 +1194,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
   visibility: visible; }
@@ -1206,12 +1206,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon-black);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
-  visibility: visible; }
-
 #identity-box {
   --identity-box-verified-color: #479900;
   --identity-box-chrome-color: #e57300;
@@ -1280,9 +1274,10 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
 
 #identity-box[sharing] > #identity-icon,
 #sharing-icon {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear identity-box-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to tab-sharing-icon-pulse in tabs.inc.css */
+@keyframes identity-box-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -1330,24 +1325,13 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
    type of icon displayed. This rule must be defined before the others in order
    for its list-style-image to be overridden. */
 .notification-anchor-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-info?size=16); }
-
-@media (min-resolution: 1.1dppx) {
-  .notification-anchor-icon {
-    list-style-image: url(moz-icon://stock/gtk-dialog-info?size=dialog); } }
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px; }
+  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info); }
 
 .notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
 #blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8; }
-
 /* INDIVIDUAL NOTIFICATIONS */
 .popup-notification-icon[popupid="web-notifications"],
 .desktop-notification-icon {
@@ -1535,6 +1519,25 @@ html|*#webRTC-previewVideo {
 .addon-install-confirmation-name {
   font-weight: bold; }
 
+.addon-webext-perm-header {
+  font-size: 1.3em; }
+
+.addon-webext-name {
+  font-weight: bold;
+  margin: 0; }
+
+.addon-addon-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/menuPanel.svg");
+  -moz-image-region: rect(0px, 288px, 32px, 256px); }
+
+.addon-toolbar-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/Toolbar.png");
+  -moz-image-region: rect(0, 486px, 18px, 468px); }
+
 /* Notification icon box */
 .notification-anchor-icon:-moz-focusring {
   outline: 1px dotted -moz-DialogText; }
@@ -1732,12 +1735,12 @@ notification[value="translation"] menulist > .menulist-dropmarker {
   border-radius: 2px;
   border: 1px solid transparent; }
 
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight; }
-
 .ac-title {
   font-size: 1.05em; }
 
+.ac-separator,
+.ac-url,
+.ac-action,
 .ac-tags {
   font-size: 0.9em; }
 
@@ -1748,18 +1751,11 @@ html|span.ac-tag {
   border: 1px solid transparent;
   padding: 0 1px; }
 
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
+.ac-separator:not([selected=true]),
+.ac-url:not([selected=true]),
+.ac-action:not([selected=true]) {
   color: -moz-nativehyperlinktext; }
 
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important; }
-
 .ac-tags-text[selected] > html|span.ac-tag {
   background-color: HighlightText;
   color: Highlight; }
@@ -1775,26 +1771,14 @@ html|span.ac-emphasize-text-url {
 .ac-type-icon[type=bookmark][selected][current] {
   list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted"); }
 
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
+.ac-site-icon[type=searchengine] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon); }
 
 .ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
+.ac-site-icon[type=searchengine][selected] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted); }
 
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=switchtab],
 .ac-type-icon[type=remotetab] {
   list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab"); }
@@ -2158,9 +2142,10 @@ html|span.ac-emphasize-text-url {
 
 .tab-icon-image[sharing]:not([selected]),
 .tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear tab-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to identity-box-sharing-icon-pulse in identity-block.inc.css */
+@keyframes tab-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -2236,7 +2221,7 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound[muted],
 .tab-icon-sound[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .tab-icon-sound[muted] {
@@ -2248,12 +2233,12 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-darktext[muted],
 .tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
 
 .tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-brighttext[muted],
 .tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
 
 .tab-icon-sound[soundplaying]:not(:hover),
 .tab-icon-sound[muted]:not(:hover),
@@ -2454,7 +2439,7 @@ lwtHeader;*/
 .alltabs-endimage[muted],
 .alltabs-endimage[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .alltabs-endimage[muted] {
@@ -2987,7 +2972,7 @@ html|*.pointerlockfswarning-exit-button {
 /* NOTE: THESE NEED TO STAY IN SYNC WITH LIGHT-THEME.CSS AND DARK-THEME.CSS.
    We are copy/pasting variables from light-theme and dark-theme,
    since they aren't loaded in this context (within browser.css). */
-:root[devtoolstheme="light"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar {
   --gcli-background-color: #fcfcfc;
   /* --theme-tab-toolbar-background */
   --gcli-input-background: #fcfcfc;
@@ -3007,7 +2992,7 @@ html|*.pointerlockfswarning-exit-button {
   --command-line-image-focus: url(chrome://devtools/skin/images/commandline-icon.svg#light-theme-focus);
   /* --theme-command-line-image-focus */ }
 
-:root[devtoolstheme="dark"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar {
   --gcli-background-color: #272b35;
   /* --theme-toolbar-background */
   --gcli-input-background: #272b35;
@@ -3045,8 +3030,8 @@ html|*.pointerlockfswarning-exit-button {
 .developer-toolbar-button > image {
   margin: auto 10px; }
 
-:root[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
-:root[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
+#browser-bottombox[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
   filter: invert(1); }
 
 .developer-toolbar-button > .toolbarbutton-icon {
@@ -3054,7 +3039,7 @@ html|*.pointerlockfswarning-exit-button {
   height: 16px; }
 
 /* The toolkit close button is low contrast in the dark theme so invert it. */
-:root[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
   filter: invert(1); }
 
 #developer-toolbar-toolbox-button {
@@ -3534,7 +3519,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   width: 20px;
   height: 20px;
   border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
+  background-image: url("chrome://browser/content/default-theme-icon.svg");
   background-size: contain; }
 
 #main-window[customize-entered] #customization-panel-container {
@@ -3671,7 +3656,7 @@ toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
   padding-inline-start: 0; }
 
 .customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png); }
+  list-style-image: url(chrome://browser/content/default-theme-icon.svg); }
 
 .customization-lwtheme-menu-theme[active="true"],
 .customization-lwtheme-menu-theme:hover {
@@ -4086,7 +4071,7 @@ notification.heartbeat {
   width: 16px; }
 
 /**
- * Override the --panel-arrowcontent-padding so the background extends
+ * Override the --arrowpanel-padding so the background extends
  * to the sides and bottom of the panel.
  */
 #UITourTooltipButtons {
@@ -4105,7 +4090,7 @@ notification.heartbeat {
   width: 16px;
   height: 16px;
   margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #context-back {
diff --git a/arc-firefox-theme/chrome/browser/devedition.css b/arc-firefox-theme/chrome/browser/compacttheme.css
index 43603c1..12789d0 100644
--- a/arc-firefox-theme/chrome/browser/devedition.css
+++ b/arc-firefox-theme/chrome/browser/compacttheme.css
@@ -1,8 +1,8 @@
 
 
-/* devedition.css is loaded in browser.xul after browser.css when it is
+/* compacttheme.css is loaded in browser.xul after browser.css when it is
    preffed on.  The bulk of the styling is here in the shared file, but
-   there are overrides for each platform in their devedition.css files. */
+   there are overrides for each platform in their compacttheme.css files. */
 
 :root {
   --tab-toolbar-navbar-overlap: 0px;
@@ -12,7 +12,7 @@
   --backbutton-urlbar-overlap: 0px;
 }
 
-:root[devtoolstheme="dark"] {
+:root:-moz-lwtheme-brighttext {
   /* Chrome */
   --chrome-background-color: #272b35;
   --chrome-color: #F5F7FA;
@@ -48,8 +48,8 @@
 }
 
 /* Override the lwtheme-specific styling for toolbar buttons */
-:root[devtoolstheme="dark"],
-:root[devtoolstheme="dark"] toolbar:-moz-lwtheme {
+:root:-moz-lwtheme-brighttext,
+toolbar:-moz-lwtheme-brighttext  {
   --toolbarbutton-hover-background: rgba(25,33, 38,.6) linear-gradient(rgba(25,33,38,.6), rgba(25,33,38,.6)) padding-box;
   --toolbarbutton-hover-boxshadow: none;
   --toolbarbutton-hover-bordercolor: rgba(25,33,38,.6);
@@ -60,7 +60,7 @@
 
 }
 
-:root[devtoolstheme="light"] {
+:root:-moz-lwtheme-darktext {
   --url-and-searchbar-background-color: #fff;
 
   --chrome-background-color: #E3E4E6;
@@ -83,8 +83,8 @@
 }
 
 /* Override the lwtheme-specific styling for toolbar buttons */
-:root[devtoolstheme="light"],
-:root[devtoolstheme="light"] toolbar:-moz-lwtheme {
+:root:-moz-lwtheme-darktext,
+toolbar:-moz-lwtheme-darktext {
   --toolbarbutton-hover-background: #eaeaea;
   --toolbarbutton-hover-boxshadow: none;
   --toolbarbutton-hover-bordercolor: rgba(0,0,0,0.1);
@@ -195,63 +195,59 @@ toolbar[brighttext] #downloads-indicator-counter {
 }
 
 
-:root[devtoolstheme="dark"] #identity-icon:-moz-lwtheme {
+#identity-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-white);
 }
 
-:root[devtoolstheme="dark"] #identity-box:hover > #identity-icon:not(.no-hover):-moz-lwtheme,
-:root[devtoolstheme="dark"] #identity-box[open=true] > #identity-icon:-moz-lwtheme {
+#identity-box:hover > #identity-icon:not(.no-hover):-moz-lwtheme-brighttext,
+#identity-box[open=true] > #identity-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#hover-white);
 }
 
-:root[devtoolstheme="dark"] #identity-box.grantedPermissions > #identity-icon:-moz-lwtheme {
+#identity-box.grantedPermissions > #identity-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#notice-white);
 }
 
-:root[devtoolstheme="dark"] #identity-box.grantedPermissions:hover > #identity-icon:not(.no-hover):-moz-lwtheme,
-:root[devtoolstheme="dark"] #identity-box.grantedPermissions[open=true] > #identity-icon:-moz-lwtheme {
+#identity-box.grantedPermissions:hover > #identity-icon:not(.no-hover):-moz-lwtheme-brighttext,
+#identity-box.grantedPermissions[open=true] > #identity-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#notice-hover-white);
 }
 
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.chromeUI > #identity-icon:-moz-lwtheme {
+#urlbar[pageproxystate="valid"] > #identity-box.chromeUI > #identity-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://branding/content/identity-icons-brand.svg);
 }
 
 
-:root[devtoolstheme="dark"] #tracking-protection-icon:-moz-lwtheme {
+#tracking-protection-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/tracking-protection-16.svg#enabled-white);
 }
 
-:root[devtoolstheme="dark"] #tracking-protection-icon[state="loaded-tracking-content"]:-moz-lwtheme {
+#tracking-protection-icon[state="loaded-tracking-content"]:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/tracking-protection-16.svg#disabled-white);
 }
 
 
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain > #connection-icon:-moz-lwtheme,
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity > #connection-icon:-moz-lwtheme,
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.mixedActiveBlocked > #connection-icon:-moz-lwtheme {
+#urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedActiveBlocked > #connection-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible;
 }
 
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-white);
   visibility: visible;
 }
 
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.insecureLoginForms > #connection-icon:-moz-lwtheme,
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.mixedActiveContent > #connection-icon:-moz-lwtheme {
+#urlbar[pageproxystate="valid"] > #identity-box.insecureLoginForms > #connection-icon:-moz-lwtheme-brighttext,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedActiveContent > #connection-icon:-moz-lwtheme-brighttext {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon-white);
   visibility: visible;
 }
 
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-:root[devtoolstheme="dark"] #urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-white);
-  visibility: visible;
-}
-
 #urlbar {
   border-inline-start: none !important;
   opacity: 1 !important;
@@ -263,11 +259,20 @@ window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
   margin-inline-start: 0;
 }
 
-:root[devtoolstheme="dark"] #urlbar-zoom-button:hover {
+window:not([chromehidden~="toolbar"]) #urlbar-wrapper:-moz-locale-dir(rtl),
+window:not([chromehidden~="toolbar"]) #urlbar-wrapper > #urlbar:-moz-locale-dir(rtl) {
+  /* Resolves text blurring issue when hovering, see bug 1340206 */
+  transform: none;
+  /* For some reason, this property must be specified here, even though the same
+     value is set in the previous rule set. o_O */
+  margin-inline-start: 0;
+}
+
+#urlbar-zoom-button:-moz-lwtheme-brighttext:hover {
   background-color: rgba(255,255,255,.2);
 }
 
-:root[devtoolstheme="dark"] #urlbar-zoom-button:hover:active {
+#urlbar-zoom-button:-moz-lwtheme-brighttext:hover:active {
   background-color: rgba(255,255,255,.3);
 }
 
@@ -281,7 +286,6 @@ window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
 }
 
 /* No extra vertical padding for nav bar */
-#nav-bar-customization-target,
 #nav-bar {
   padding-top: 0;
   padding-bottom: 0;
@@ -344,9 +348,19 @@ window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
   background-color: var(--tab-selection-background-color);
 }
 
+.tab-throbber[selected][progress] {
+  list-style-image: url("chrome://browser/skin/compacttheme/loading-inverted.png");
+}
+
+@media (min-resolution: 1.1dppx) {
+  .tab-throbber[selected][progress] {
+    list-style-image: url("chrome://browser/skin/compacttheme/loading-inverted@2x.png");
+  }
+}
+
 .tab-icon-sound[soundplaying],
 .tab-icon-sound[muted] {
-  filter: url(chrome://browser/skin/filters.svg#fill) !important; /* removes drop-shadow filter */
+  filter: url(chrome://global/skin/filters.svg#fill) !important; /* removes drop-shadow filter */
 }
 
 /* Don't need space for the tab curves (66px - 30px) */
@@ -364,7 +378,7 @@ window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
   --forwardbutton-width: 29px;
 }
 
-:root[devtoolstheme="light"] {
+:root:-moz-lwtheme-darktext {
   --urlbar-dropmarker-url: url("chrome://browser/skin/devedition/urlbar-history-dropmarker.svg");
   --urlbar-dropmarker-region: rect(0px, 11px, 14px, 0px);
   --urlbar-dropmarker-hover-region: rect(0, 22px, 14px, 11px);
@@ -375,8 +389,8 @@ window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
   --urlbar-dropmarker-active-2x-region: rect(0px, 33px, 14px, 22px);
 }
 
-:root[devtoolstheme="dark"] .findbar-closebutton:not(:hover),
-:root[devtoolstheme="dark"] #sidebar-header > .close-icon:not(:hover),
+.findbar-closebutton:-moz-lwtheme-brighttext:not(:hover),
+#sidebar-header > .close-icon:-moz-lwtheme-brighttext:not(:hover),
 .tab-close-button[selected]:not(:hover) {
   background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 80, 16, 64);
 }
diff --git a/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted.png b/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted.png
new file mode 100644
index 0000000..b9ee1a7
--- /dev/null
+++ b/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted.png
diff --git a/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted@2x.png b/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted@2x.png
new file mode 100644
index 0000000..852c4ee
--- /dev/null
+++ b/arc-firefox-theme/chrome/browser/compacttheme/loading-inverted@2x.png
diff --git a/arc-firefox-theme/chrome/browser/controlcenter/panel.css b/arc-firefox-theme/chrome/browser/controlcenter/panel.css
index 0488442..4d8f112 100644
--- a/arc-firefox-theme/chrome/browser/controlcenter/panel.css
+++ b/arc-firefox-theme/chrome/browser/controlcenter/panel.css
@@ -102,7 +102,7 @@
 #identity-popup-permissions-content,
 #tracking-protection-content {
   padding: 0.5em 0 1em;
-  /* .identity-popup-headline.host depends on this width */
+  /* .identity-popup-host depends on this width */
   padding-inline-start: calc(2em + 24px);
   padding-inline-end: 1em;
 }
@@ -181,7 +181,7 @@
   font-size: 150%;
 }
 
-.identity-popup-headline.host {
+.identity-popup-host {
   word-wrap: break-word;
   /* 1em + 2em + 24px is #identity-popup-security-content padding
    * 30em is .panel-mainview:not([panelid="PanelUI-popup"]) width */
@@ -422,7 +422,7 @@ description#identity-popup-content-verifier,
   width: 16px;
   height: 16px;
   list-style-image: url(chrome://browser/skin/panel-icons.svg#cancel);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: graytext;
 }
 
diff --git a/arc-firefox-theme/chrome/browser/customizableui/panelUI.css b/arc-firefox-theme/chrome/browser/customizableui/panelUI.css
index 17faf34..6555340 100644
--- a/arc-firefox-theme/chrome/browser/customizableui/panelUI.css
+++ b/arc-firefox-theme/chrome/browser/customizableui/panelUI.css
@@ -147,6 +147,11 @@
   filter: none;
 }
 
+#PanelUI-menu-button[badge-status="addon-alert"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
+  height: 13px;
+  background: transparent url(chrome://browser/skin/addons/addon-badge.svg) no-repeat center;
+}
+
 .panel-subviews {
   padding: 4px;
   background-clip: padding-box;
@@ -553,7 +558,8 @@ toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
   top: 25%;
 }
 
-#PanelUI-update-status[update-status]::after {
+#PanelUI-update-status[update-status]::after,
+#PanelUI-footer-addons > toolbarbutton::after {
   content: "";
   width: 14px;
   height: 14px;
@@ -574,6 +580,24 @@ toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
   background-color: #D90000;
 }
 
+#PanelUI-footer-addons > toolbarbutton {
+  background-color: #C7F5FF;
+  display: flex;
+  flex: 1 1 0%;
+  width: calc(22.35em + 30px);
+  padding-inline-start: 15px;
+  border-inline-start-style: none;
+}
+
+#PanelUI-footer-addons > toolbarbutton > .toolbarbutton-icon {
+  width: 14px;
+  height: 14px;
+}
+
+#PanelUI-footer-addons > toolbarbutton::after {
+  background-image: url(chrome://browser/skin/addons/addon-badge.svg);
+}
+
 #PanelUI-fxa-status {
   display: flex;
   flex: 1 1 0%;
@@ -608,6 +632,7 @@ toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
 #PanelUI-help,
 #PanelUI-fxa-label,
 #PanelUI-fxa-icon,
+#PanelUI-footer-addons > toolbarbutton,
 #PanelUI-customize,
 #PanelUI-quit {
   margin: 0;
@@ -669,6 +694,7 @@ toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
 }
 
 #PanelUI-fxa-label,
+#PanelUI-footer-addons > toolbarbutton,
 #PanelUI-customize {
   flex: 1;
   padding-inline-start: 15px;
@@ -833,6 +859,7 @@ toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
 
 #PanelUI-fxa-label,
 #PanelUI-fxa-icon,
+#PanelUI-footer-addons > toolbarbutton,
 #PanelUI-customize,
 #PanelUI-help,
 #PanelUI-quit {
diff --git a/arc-firefox-theme/chrome/browser/downloads/allDownloadsViewOverlay.css b/arc-firefox-theme/chrome/browser/downloads/allDownloadsViewOverlay.css
index 2b23903..1637216 100644
--- a/arc-firefox-theme/chrome/browser/downloads/allDownloadsViewOverlay.css
+++ b/arc-firefox-theme/chrome/browser/downloads/allDownloadsViewOverlay.css
@@ -83,7 +83,7 @@ richlistitem.download > toolbarseparator {
   width: 16px;
   height: 16px;
   margin: 0;
-  filter: url("chrome://browser/skin/filters.svg#fill");
+  filter: url("chrome://global/skin/filters.svg#fill");
   fill: currentColor;
 }
 
diff --git a/arc-firefox-theme/chrome/browser/downloads/downloads.css b/arc-firefox-theme/chrome/browser/downloads/downloads.css
index 1bd933a..03c47d0 100644
--- a/arc-firefox-theme/chrome/browser/downloads/downloads.css
+++ b/arc-firefox-theme/chrome/browser/downloads/downloads.css
@@ -133,8 +133,8 @@ richlistitem[type="download"]:hover > toolbarseparator,
 .downloadsDropmarker > .button-box > .button-menu-dropmarker > .dropmarker-icon {
   width: 16px;
   height: 16px;
-  list-style-image: url("chrome://browser/skin/downloads/menubutton-dropmarker.svg");
-  filter: url("chrome://browser/skin/filters.svg#fill");
+  list-style-image: url("chrome://global/skin/icons/menubutton-dropmarker.svg");
+  filter: url("chrome://global/skin/filters.svg#fill");
   fill: currentColor;
 }
 
@@ -247,7 +247,7 @@ richlistitem[type="download"][verdict] > toolbarseparator {
   width: 16px;
   height: 16px;
   margin: 1px;
-  filter: url("chrome://browser/skin/filters.svg#fill");
+  filter: url("chrome://global/skin/filters.svg#fill");
   fill: currentColor;
 }
 
diff --git a/arc-firefox-theme/chrome/browser/downloads/menubutton-dropmarker.svg b/arc-firefox-theme/chrome/browser/downloads/menubutton-dropmarker.svg
deleted file mode 100644
index 76af113..0000000
--- a/arc-firefox-theme/chrome/browser/downloads/menubutton-dropmarker.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0"?>
-<!-- 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 d="m 2,6 6,6 6,-6 -1.5,-1.5 -4.5,4.5 -4.5,-4.5 z" />
-</svg>
diff --git a/arc-firefox-theme/chrome/browser/feeds/subscribe-ui.css b/arc-firefox-theme/chrome/browser/feeds/subscribe-ui.css
deleted file mode 100644
index f165003..0000000
--- a/arc-firefox-theme/chrome/browser/feeds/subscribe-ui.css
+++ /dev/null
@@ -1,7 +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/. */
-
-.alwaysUse {
-  padding: 5px;
-}
diff --git a/arc-firefox-theme/chrome/browser/filters.svg b/arc-firefox-theme/chrome/browser/filters.svg
deleted file mode 100644
index 8fccb13..0000000
--- a/arc-firefox-theme/chrome/browser/filters.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<!-- 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">
-  <filter id="fill">
-    <feComposite in="FillPaint" in2="SourceGraphic" operator="in"/>
-  </filter>
-</svg>
diff --git a/arc-firefox-theme/chrome/browser/newtab/whimsycorn.png b/arc-firefox-theme/chrome/browser/newtab/whimsycorn.png
deleted file mode 100644
index 5c5c2f4..0000000
--- a/arc-firefox-theme/chrome/browser/newtab/whimsycorn.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/notification-icons.svg b/arc-firefox-theme/chrome/browser/notification-icons.svg
index 5250770..de73d82 100644
--- a/arc-firefox-theme/chrome/browser/notification-icons.svg
+++ b/arc-firefox-theme/chrome/browser/notification-icons.svg
@@ -34,9 +34,8 @@
 
 </style>
   <style>
-    use:not(:target) {
-      display: none;
-    }
+    :root > use:not(:target),
+    :root > g:not(:target),
     #strikeout {
       display: none;
     }
@@ -44,7 +43,7 @@
       display: block;
     }
     .blocked {
-      clip-path: url(#clip);
+      clip-path: url(#blocked-clipPath);
     }
 
     #login-highlighted {
@@ -64,6 +63,13 @@
       fill: rgb(224, 41, 29);
       fill-opacity: 1;
     }
+
+    #camera-indicator,
+    #microphone-indicator,
+    #screen-indicator {
+      fill: white;
+      fill-opacity: 1;
+    }
   </style>
 
   <defs>
@@ -83,13 +89,24 @@
     <path id="popup-icon" d="m 2,24 a 4,4 0 0 0 4,4 l 8,0 a 10,10 0 0 1 -2,-4 l -4,0 a 2,2 0 0 1 -2,-2 l 0,-12 18,0 0,2 a 10,10 0 0 1 4,2 l 0,-8 a 4,4 0 0 0 -4,-4 l -18,0 a 4,4 0 0 0 -4,4 z m 12,-2.1 a 8,8 0 1 1 0,0.2 m 10.7,-4.3 a 5,5 0 0 0 -6.9,6.9 z m -5.4,8.4 a 5,5 0 0 0 6.9,-6.9 z" />
     <path id="screen-icon" d="m 2,18 a 2,2 0 0 0 2,2 l 2,0 0,-6 a 4,4 0 0 1 4,-4 l 14,0 0,-6 a 2,2 0 0 0 -2,-2 l -18,0 a 2,2 0 0 0 -2,2 z m 6,10 a 2,2 0 0 0 2,2 l 18,0 a 2,2 0 0 0 2,-2 l 0,-14 a 2,2 0 0 0 -2,-2 l -18,0 a 2,2 0 0 0 -2,2 z" />
 
-    <clipPath id="clip">
+    <clipPath id="blocked-clipPath">
       <path d="m 0,0 0,31 31,-31 z m 6,32 26,0 0,-26 z"/>
     </clipPath>
+
+    <mask id="i-mask" style="fill-opacity: 1;">
+      <rect fill="white" width="32" height="32"/>
+      <circle fill="black" cx="16" cy="9" r="2.5"/>
+      <rect fill="black" x="14" y="14" width="4" height="10" rx="2" ry="2"/>
+    </mask>
   </defs>
 
+  <g id="default-info">
+    <circle cx="16" cy="16" r="14" mask="url(#i-mask)"/>
+  </g>
+
   <use id="camera" xlink:href="#camera-icon" />
   <use id="camera-sharing" xlink:href="#camera-icon"/>
+  <use id="camera-indicator" xlink:href="#camera-icon" />
   <use id="camera-blocked" class="blocked" xlink:href="#camera-icon" />
   <use id="desktop-notification" xlink:href="#desktop-notification-icon" />
   <use id="desktop-notification-blocked" class="blocked" xlink:href="#desktop-notification-icon" />
@@ -108,6 +125,7 @@
   <use id="login-detailed" xlink:href="#login-detailed-icon" />
   <use id="microphone" xlink:href="#microphone-icon" />
   <use id="microphone-sharing" xlink:href="#microphone-icon"/>
+  <use id="microphone-indicator" xlink:href="#microphone-icon"/>
   <use id="microphone-blocked" class="blocked" xlink:href="#microphone-icon" />
   <use id="microphone-detailed" xlink:href="#microphone-detailed-icon" />
   <use id="plugin" xlink:href="#plugin-icon" />
@@ -115,6 +133,7 @@
   <use id="popup" xlink:href="#popup-icon" />
   <use id="screen" xlink:href="#screen-icon" />
   <use id="screen-sharing" xlink:href="#screen-icon"/>
+  <use id="screen-indicator" xlink:href="#screen-icon"/>
   <use id="screen-blocked" class="blocked" xlink:href="#screen-icon" />
 
   <path id="strikeout" d="m 2,28 2,2 26,-26 -2,-2 z"/>
diff --git a/arc-firefox-theme/chrome/browser/places/autocomplete-star.png b/arc-firefox-theme/chrome/browser/places/autocomplete-star.png
deleted file mode 100644
index 2675f93..0000000
--- a/arc-firefox-theme/chrome/browser/places/autocomplete-star.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/preferences/containers.css b/arc-firefox-theme/chrome/browser/preferences/containers.css
index 308f573..e2f23fc 100644
--- a/arc-firefox-theme/chrome/browser/preferences/containers.css
+++ b/arc-firefox-theme/chrome/browser/preferences/containers.css
@@ -87,7 +87,7 @@
 .subviewbutton[usercontextid] > .toolbarbutton-icon,
 #userContext-indicator {
   background-image: var(--identity-icon);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: var(--identity-icon-color);
   background-size: contain;
   background-repeat: no-repeat;
@@ -100,12 +100,12 @@
   --preference-active-color: #858585;
 }
 
-radiogroup {
+.radio-buttons {
   display: flex;
   margin-inline-start: 0.35rem;
 }
 
-radio {
+.radio-buttons > radio {
   flex: auto;
   display: flex;
   align-items: center;
@@ -125,19 +125,23 @@ radio {
   fill: #4d4d4d;
 }
 
+.radio-buttons > radio {
+  padding-inline-start: 2px;
+}
+
 radio > [data-identity-icon] {
   inline-size: 22px;
   block-size: 22px;
 }
 
-radio[selected=true] {
+.radio-buttons > radio[selected=true] {
   outline-color: var(--preference-unselected-color);
 }
 
-radio[focused=true] {
+.radio-buttons > radio[focused=true] {
   outline-color: var(--preference-selected-color);
 }
 
-radio:hover:active {
+.radio-buttons > radio:hover:active {
   outline-color: var(--preference-active-color);
 }
diff --git a/arc-firefox-theme/chrome/browser/preferences/in-content/containers.css b/arc-firefox-theme/chrome/browser/preferences/in-content/containers.css
index 73e499a..3f21fed 100644
--- a/arc-firefox-theme/chrome/browser/preferences/in-content/containers.css
+++ b/arc-firefox-theme/chrome/browser/preferences/in-content/containers.css
@@ -87,7 +87,7 @@
 .subviewbutton[usercontextid] > .toolbarbutton-icon,
 #userContext-indicator {
   background-image: var(--identity-icon);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: var(--identity-icon-color);
   background-size: contain;
   background-repeat: no-repeat;
diff --git a/arc-firefox-theme/chrome/browser/preferences/in-content/preferences.css b/arc-firefox-theme/chrome/browser/preferences/in-content/preferences.css
index 51042a4..d774c77 100644
--- a/arc-firefox-theme/chrome/browser/preferences/in-content/preferences.css
+++ b/arc-firefox-theme/chrome/browser/preferences/in-content/preferences.css
@@ -42,6 +42,12 @@ treecol {
   min-width: 26px;
 }
 
+.learnMore {
+  margin-inline-start: 1.5em;
+  font-weight: normal;
+  white-space: nowrap;
+}
+
 /* Category List */
 
 #categories {
@@ -173,15 +179,6 @@ treecol {
 }
 
 /* Content pane */
-#playDRMContentLink {
-  /* Line up with the buttons in the other grid bits: */
-  margin-left: 4px !important;
-  margin-right: 4px !important;
-}
-
-#notificationsPolicyLearnMore {
-  margin-inline-start: 1.5em !important;
-}
 
 #defaultFontSizeLabel {
   /* !important needed to override common !important rule */
@@ -230,14 +227,6 @@ treecol {
 
 /* Privacy pane */
 
-#trackingProtectionPBMLearnMore,
-#trackingProtectionLearnMore,
-#browserContainersLearnMore {
-  margin-inline-start: 1.5em !important;
-  margin-top: 0;
-  font-weight: normal;
-}
-
 .doNotTrackLearnMore {
   margin-inline-start: calc(1em + 30px);
   margin-bottom: 1em;
@@ -283,17 +272,6 @@ description > html|a {
   margin-inline-end: 4px; /* add the 4px end-margin of other elements */
 }
 
-#telemetryLearnMore,
-#FHRLearnMore,
-#crashReporterLearnMore {
-  /* provide some margin between the links and the label text */
-  /* !important is needed to override the rules defined in common.css */
-  margin-inline-start: 20px !important;
-  /* center the links */
-  margin-top: 8px;
-  margin-bottom: 8px;
-}
-
 .indent {
   /* !important needed to override margin-inline-start:0 !important; rule
      define in common.css for labels */
@@ -420,9 +398,6 @@ description > html|a {
 }
 
 #noFxaAccount {
-  /* Overriding the margins from the base preferences.css theme file.
-     These overrides can be simplified by fixing bug 1027174 */
-  margin: 0;
   padding-top: 15px;
 }
 
@@ -512,7 +487,7 @@ description > html|a {
 }
 
 .fxaAccountBoxButtons > button:first-child {
-  margin-right: 14px !important;
+  margin-inline-end: 14px !important;
 }
 
 .fxaSyncIllustration {
diff --git a/arc-firefox-theme/chrome/browser/preferences/preferences.css b/arc-firefox-theme/chrome/browser/preferences/preferences.css
index 45e2dc2..810a9f8 100644
--- a/arc-firefox-theme/chrome/browser/preferences/preferences.css
+++ b/arc-firefox-theme/chrome/browser/preferences/preferences.css
@@ -54,7 +54,7 @@
 
 #advancedPrefs {
   margin-left: 0;
-  margin-right: 0; 
+  margin-right: 0;
 }
 
 #cookiesChildren::-moz-tree-image(domainCol, container) {
@@ -97,7 +97,6 @@
 }
 
 #noFxaAccount {
-  margin: 5px;
   line-height: 1.2em;
 }
 
diff --git a/arc-firefox-theme/chrome/browser/sass/_browser-sass.scss b/arc-firefox-theme/chrome/browser/sass/_browser-sass.scss
index 1e89eed..90b5124 100644
--- a/arc-firefox-theme/chrome/browser/sass/_browser-sass.scss
+++ b/arc-firefox-theme/chrome/browser/sass/_browser-sass.scss
@@ -1009,7 +1009,7 @@ toolbarpaletteitem[place="palette"] > :-moz-any(#back-button, #forward-button, #
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
 
@@ -1546,6 +1546,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   visibility: visible;
 }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
   visibility: visible;
@@ -1557,13 +1560,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   visibility: visible;
 }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-  visibility: visible;
-}
-
 
 #identity-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-black);
@@ -1604,6 +1600,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   visibility: visible;
 }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
   visibility: visible;
@@ -1615,13 +1614,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   visibility: visible;
 }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
-  visibility: visible;
-}
-
 #identity-box {
   --identity-box-verified-color: hsl(92,100%,30%);
   --identity-box-chrome-color: rgb(229,115,0);
@@ -1727,10 +1719,11 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
 
 #identity-box[sharing] > #identity-icon,
 #sharing-icon {
-  animation: 3s linear pulse infinite;
+  animation: 3s linear identity-box-sharing-icon-pulse infinite;
 }
 
-@keyframes pulse {
+/* This should remain identical to tab-sharing-icon-pulse in tabs.inc.css */
+@keyframes identity-box-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0;
   }
@@ -1793,31 +1786,15 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
    type of icon displayed. This rule must be defined before the others in order
    for its list-style-image to be overridden. */
 .notification-anchor-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-info?size=16);
-}
-
-@media (min-resolution: 1.1dppx) {
-  .notification-anchor-icon {
-    list-style-image: url(moz-icon://stock/gtk-dialog-info?size=dialog);
-  }
-}
-
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px;
+  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info);
 }
 
 .notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
 #blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
 
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8;
-}
-
 /* INDIVIDUAL NOTIFICATIONS */
 
 .popup-notification-icon[popupid="web-notifications"],
@@ -2063,6 +2040,29 @@ html|*#webRTC-previewVideo {
   font-weight: bold;
 }
 
+.addon-webext-perm-header {
+  font-size: 1.3em;
+}
+
+.addon-webext-name {
+  font-weight: bold;
+  margin: 0;
+}
+
+.addon-addon-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/menuPanel.svg");
+  -moz-image-region: rect(0px, 288px, 32px, 256px);
+}
+
+.addon-toolbar-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/Toolbar.png");
+  -moz-image-region: rect(0, 486px, 18px, 468px);
+}
+
 /* Notification icon box */
 
 .notification-anchor-icon:-moz-focusring {
@@ -2315,14 +2315,13 @@ notification[value="translation"] menulist > .menulist-dropmarker {
   border: 1px solid transparent;
 }
 
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight;
-}
-
 .ac-title {
   font-size: 1.05em;
 }
 
+.ac-separator,
+.ac-url,
+.ac-action,
 .ac-tags {
   font-size: 0.9em;
 }
@@ -2335,20 +2334,12 @@ html|span.ac-tag {
   padding: 0 1px;
 }
 
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
+.ac-separator:not([selected=true]),
+.ac-url:not([selected=true]),
+.ac-action:not([selected=true]) {
   color: -moz-nativehyperlinktext;
 }
 
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important;
-}
-
 .ac-tags-text[selected] > html|span.ac-tag {
   background-color: HighlightText;
   color: Highlight;
@@ -2368,30 +2359,16 @@ html|span.ac-emphasize-text-url {
   list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted");
 }
 
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px;
-}
-
 .ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
+.ac-site-icon[type=searchengine] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon);
 }
 
 .ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
+.ac-site-icon[type=searchengine][selected] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted);
 }
 
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px;
-}
-
 .ac-type-icon[type=switchtab],
 .ac-type-icon[type=remotetab] {
   list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab");
@@ -2865,10 +2842,11 @@ html|span.ac-emphasize-text-url {
 
 .tab-icon-image[sharing]:not([selected]),
 .tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite;
+  animation: 3s linear tab-sharing-icon-pulse infinite;
 }
 
-@keyframes pulse {
+/* This should remain identical to identity-box-sharing-icon-pulse in identity-block.inc.css */
+@keyframes tab-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0;
   }
@@ -2980,7 +2958,7 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound[muted],
 .tab-icon-sound[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
 
@@ -2995,13 +2973,13 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-darktext[muted],
 .tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white);
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px white);
 }
 
 .tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-brighttext[muted],
 .tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black);
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px black);
 }
 
 .tab-icon-sound[soundplaying]:not(:hover),
@@ -3277,7 +3255,7 @@ html|span.ac-emphasize-text-url {
 .alltabs-endimage[muted],
 .alltabs-endimage[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
 
@@ -3964,7 +3942,7 @@ html|*.pointerlockfswarning-exit-button {
 /* NOTE: THESE NEED TO STAY IN SYNC WITH LIGHT-THEME.CSS AND DARK-THEME.CSS.
    We are copy/pasting variables from light-theme and dark-theme,
    since they aren't loaded in this context (within browser.css). */
-:root[devtoolstheme="light"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar {
   --gcli-background-color: #fcfcfc; /* --theme-tab-toolbar-background */
   --gcli-input-background: #fcfcfc; /* --theme-toolbar-background */
   --gcli-input-focused-background: #ffffff; /* --theme-sidebar-background */
@@ -3976,7 +3954,7 @@ html|*.pointerlockfswarning-exit-button {
   --command-line-image-focus: url(chrome://devtools/skin/images/commandline-icon.svg#light-theme-focus); /* --theme-command-line-image-focus */
 }
 
-:root[devtoolstheme="dark"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar {
   --gcli-background-color: #272b35; /* --theme-toolbar-background */
   --gcli-input-background: #272b35; /* --theme-tab-toolbar-background */
   --gcli-input-focused-background: #272b35; /* --theme-tab-toolbar-background */
@@ -4009,8 +3987,8 @@ html|*.pointerlockfswarning-exit-button {
   margin: auto 10px;
 }
 
-:root[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
-:root[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before  {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
+#browser-bottombox[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before  {
   filter: invert(1);
 }
 
@@ -4020,7 +3998,7 @@ html|*.pointerlockfswarning-exit-button {
 }
 
 /* The toolkit close button is low contrast in the dark theme so invert it. */
-:root[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
   filter: invert(1);
 }
 
@@ -4614,7 +4592,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   width: 20px;
   height: 20px;
   border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
+  background-image: url("chrome://browser/content/default-theme-icon.svg");
   background-size: contain;
 }
 
@@ -4783,7 +4761,7 @@ toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
 }
 
 .customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png);
+  list-style-image: url(chrome://browser/content/default-theme-icon.svg);
 }
 
 .customization-lwtheme-menu-theme[active="true"],
@@ -5292,7 +5270,7 @@ notification.heartbeat {
 }
 
 /**
- * Override the --panel-arrowcontent-padding so the background extends
+ * Override the --arrowpanel-padding so the background extends
  * to the sides and bottom of the panel.
  */
 #UITourTooltipButtons {
@@ -5314,7 +5292,7 @@ notification.heartbeat {
   width: 16px;
   height: 16px;
   margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
 
diff --git a/arc-firefox-theme/chrome/browser/sass/browser-dark.css b/arc-firefox-theme/chrome/browser/sass/browser-dark.css
index 4a15269..1171e26 100644
--- a/arc-firefox-theme/chrome/browser/sass/browser-dark.css
+++ b/arc-firefox-theme/chrome/browser/sass/browser-dark.css
@@ -760,7 +760,7 @@ toolbarpaletteitem[place="palette"] > :-moz-any(#back-button, #forward-button, #
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #home-button[cui-areatype="menu-panel"],
@@ -1154,6 +1154,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
   visibility: visible; }
@@ -1163,12 +1166,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-  visibility: visible; }
-
 #identity-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-black); }
 
@@ -1198,6 +1195,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
   visibility: visible; }
@@ -1207,12 +1207,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon-black);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
-  visibility: visible; }
-
 #identity-box {
   --identity-box-verified-color: #479900;
   --identity-box-chrome-color: #e57300;
@@ -1281,9 +1275,10 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
 
 #identity-box[sharing] > #identity-icon,
 #sharing-icon {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear identity-box-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to tab-sharing-icon-pulse in tabs.inc.css */
+@keyframes identity-box-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -1331,24 +1326,13 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
    type of icon displayed. This rule must be defined before the others in order
    for its list-style-image to be overridden. */
 .notification-anchor-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-info?size=16); }
-
-@media (min-resolution: 1.1dppx) {
-  .notification-anchor-icon {
-    list-style-image: url(moz-icon://stock/gtk-dialog-info?size=dialog); } }
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px; }
+  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info); }
 
 .notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
 #blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8; }
-
 /* INDIVIDUAL NOTIFICATIONS */
 .popup-notification-icon[popupid="web-notifications"],
 .desktop-notification-icon {
@@ -1536,6 +1520,25 @@ html|*#webRTC-previewVideo {
 .addon-install-confirmation-name {
   font-weight: bold; }
 
+.addon-webext-perm-header {
+  font-size: 1.3em; }
+
+.addon-webext-name {
+  font-weight: bold;
+  margin: 0; }
+
+.addon-addon-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/menuPanel.svg");
+  -moz-image-region: rect(0px, 288px, 32px, 256px); }
+
+.addon-toolbar-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/Toolbar.png");
+  -moz-image-region: rect(0, 486px, 18px, 468px); }
+
 /* Notification icon box */
 .notification-anchor-icon:-moz-focusring {
   outline: 1px dotted -moz-DialogText; }
@@ -1733,12 +1736,12 @@ notification[value="translation"] menulist > .menulist-dropmarker {
   border-radius: 2px;
   border: 1px solid transparent; }
 
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight; }
-
 .ac-title {
   font-size: 1.05em; }
 
+.ac-separator,
+.ac-url,
+.ac-action,
 .ac-tags {
   font-size: 0.9em; }
 
@@ -1749,18 +1752,11 @@ html|span.ac-tag {
   border: 1px solid transparent;
   padding: 0 1px; }
 
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
+.ac-separator:not([selected=true]),
+.ac-url:not([selected=true]),
+.ac-action:not([selected=true]) {
   color: -moz-nativehyperlinktext; }
 
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important; }
-
 .ac-tags-text[selected] > html|span.ac-tag {
   background-color: HighlightText;
   color: Highlight; }
@@ -1776,26 +1772,14 @@ html|span.ac-emphasize-text-url {
 .ac-type-icon[type=bookmark][selected][current] {
   list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted"); }
 
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
+.ac-site-icon[type=searchengine] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon); }
 
 .ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
+.ac-site-icon[type=searchengine][selected] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted); }
 
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=switchtab],
 .ac-type-icon[type=remotetab] {
   list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab"); }
@@ -2158,9 +2142,10 @@ html|span.ac-emphasize-text-url {
 
 .tab-icon-image[sharing]:not([selected]),
 .tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear tab-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to identity-box-sharing-icon-pulse in identity-block.inc.css */
+@keyframes tab-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -2236,7 +2221,7 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound[muted],
 .tab-icon-sound[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .tab-icon-sound[muted] {
@@ -2248,12 +2233,12 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-darktext[muted],
 .tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
 
 .tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-brighttext[muted],
 .tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
 
 .tab-icon-sound[soundplaying]:not(:hover),
 .tab-icon-sound[muted]:not(:hover),
@@ -2454,7 +2439,7 @@ lwtHeader;*/
 .alltabs-endimage[muted],
 .alltabs-endimage[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .alltabs-endimage[muted] {
@@ -2987,7 +2972,7 @@ html|*.pointerlockfswarning-exit-button {
 /* NOTE: THESE NEED TO STAY IN SYNC WITH LIGHT-THEME.CSS AND DARK-THEME.CSS.
    We are copy/pasting variables from light-theme and dark-theme,
    since they aren't loaded in this context (within browser.css). */
-:root[devtoolstheme="light"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar {
   --gcli-background-color: #fcfcfc;
   /* --theme-tab-toolbar-background */
   --gcli-input-background: #fcfcfc;
@@ -3007,7 +2992,7 @@ html|*.pointerlockfswarning-exit-button {
   --command-line-image-focus: url(chrome://devtools/skin/images/commandline-icon.svg#light-theme-focus);
   /* --theme-command-line-image-focus */ }
 
-:root[devtoolstheme="dark"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar {
   --gcli-background-color: #272b35;
   /* --theme-toolbar-background */
   --gcli-input-background: #272b35;
@@ -3045,8 +3030,8 @@ html|*.pointerlockfswarning-exit-button {
 .developer-toolbar-button > image {
   margin: auto 10px; }
 
-:root[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
-:root[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
+#browser-bottombox[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
   filter: invert(1); }
 
 .developer-toolbar-button > .toolbarbutton-icon {
@@ -3054,7 +3039,7 @@ html|*.pointerlockfswarning-exit-button {
   height: 16px; }
 
 /* The toolkit close button is low contrast in the dark theme so invert it. */
-:root[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
   filter: invert(1); }
 
 #developer-toolbar-toolbox-button {
@@ -3534,7 +3519,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   width: 20px;
   height: 20px;
   border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
+  background-image: url("chrome://browser/content/default-theme-icon.svg");
   background-size: contain; }
 
 #main-window[customize-entered] #customization-panel-container {
@@ -3671,7 +3656,7 @@ toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
   padding-inline-start: 0; }
 
 .customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png); }
+  list-style-image: url(chrome://browser/content/default-theme-icon.svg); }
 
 .customization-lwtheme-menu-theme[active="true"],
 .customization-lwtheme-menu-theme:hover {
@@ -4086,7 +4071,7 @@ notification.heartbeat {
   width: 16px; }
 
 /**
- * Override the --panel-arrowcontent-padding so the background extends
+ * Override the --arrowpanel-padding so the background extends
  * to the sides and bottom of the panel.
  */
 #UITourTooltipButtons {
@@ -4105,7 +4090,7 @@ notification.heartbeat {
   width: 16px;
   height: 16px;
   margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #context-back {
diff --git a/arc-firefox-theme/chrome/browser/sass/browser-darker.css b/arc-firefox-theme/chrome/browser/sass/browser-darker.css
index f48dd3c..ddc4dfd 100644
--- a/arc-firefox-theme/chrome/browser/sass/browser-darker.css
+++ b/arc-firefox-theme/chrome/browser/sass/browser-darker.css
@@ -760,7 +760,7 @@ toolbarpaletteitem[place="palette"] > :-moz-any(#back-button, #forward-button, #
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #home-button[cui-areatype="menu-panel"],
@@ -1153,6 +1153,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
   visibility: visible; }
@@ -1162,12 +1165,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-  visibility: visible; }
-
 #identity-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-black); }
 
@@ -1197,6 +1194,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
   visibility: visible; }
@@ -1206,12 +1206,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon-black);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
-  visibility: visible; }
-
 #identity-box {
   --identity-box-verified-color: #479900;
   --identity-box-chrome-color: #e57300;
@@ -1280,9 +1274,10 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
 
 #identity-box[sharing] > #identity-icon,
 #sharing-icon {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear identity-box-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to tab-sharing-icon-pulse in tabs.inc.css */
+@keyframes identity-box-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -1330,24 +1325,13 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
    type of icon displayed. This rule must be defined before the others in order
    for its list-style-image to be overridden. */
 .notification-anchor-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-info?size=16); }
-
-@media (min-resolution: 1.1dppx) {
-  .notification-anchor-icon {
-    list-style-image: url(moz-icon://stock/gtk-dialog-info?size=dialog); } }
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px; }
+  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info); }
 
 .notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
 #blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8; }
-
 /* INDIVIDUAL NOTIFICATIONS */
 .popup-notification-icon[popupid="web-notifications"],
 .desktop-notification-icon {
@@ -1535,6 +1519,25 @@ html|*#webRTC-previewVideo {
 .addon-install-confirmation-name {
   font-weight: bold; }
 
+.addon-webext-perm-header {
+  font-size: 1.3em; }
+
+.addon-webext-name {
+  font-weight: bold;
+  margin: 0; }
+
+.addon-addon-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/menuPanel.svg");
+  -moz-image-region: rect(0px, 288px, 32px, 256px); }
+
+.addon-toolbar-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/Toolbar.png");
+  -moz-image-region: rect(0, 486px, 18px, 468px); }
+
 /* Notification icon box */
 .notification-anchor-icon:-moz-focusring {
   outline: 1px dotted -moz-DialogText; }
@@ -1732,12 +1735,12 @@ notification[value="translation"] menulist > .menulist-dropmarker {
   border-radius: 2px;
   border: 1px solid transparent; }
 
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight; }
-
 .ac-title {
   font-size: 1.05em; }
 
+.ac-separator,
+.ac-url,
+.ac-action,
 .ac-tags {
   font-size: 0.9em; }
 
@@ -1748,18 +1751,11 @@ html|span.ac-tag {
   border: 1px solid transparent;
   padding: 0 1px; }
 
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
+.ac-separator:not([selected=true]),
+.ac-url:not([selected=true]),
+.ac-action:not([selected=true]) {
   color: -moz-nativehyperlinktext; }
 
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important; }
-
 .ac-tags-text[selected] > html|span.ac-tag {
   background-color: HighlightText;
   color: Highlight; }
@@ -1775,26 +1771,14 @@ html|span.ac-emphasize-text-url {
 .ac-type-icon[type=bookmark][selected][current] {
   list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted"); }
 
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
+.ac-site-icon[type=searchengine] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon); }
 
 .ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
+.ac-site-icon[type=searchengine][selected] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted); }
 
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=switchtab],
 .ac-type-icon[type=remotetab] {
   list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab"); }
@@ -2158,9 +2142,10 @@ html|span.ac-emphasize-text-url {
 
 .tab-icon-image[sharing]:not([selected]),
 .tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear tab-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to identity-box-sharing-icon-pulse in identity-block.inc.css */
+@keyframes tab-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -2236,7 +2221,7 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound[muted],
 .tab-icon-sound[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .tab-icon-sound[muted] {
@@ -2248,12 +2233,12 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-darktext[muted],
 .tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
 
 .tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-brighttext[muted],
 .tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
 
 .tab-icon-sound[soundplaying]:not(:hover),
 .tab-icon-sound[muted]:not(:hover),
@@ -2454,7 +2439,7 @@ lwtHeader;*/
 .alltabs-endimage[muted],
 .alltabs-endimage[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .alltabs-endimage[muted] {
@@ -2987,7 +2972,7 @@ html|*.pointerlockfswarning-exit-button {
 /* NOTE: THESE NEED TO STAY IN SYNC WITH LIGHT-THEME.CSS AND DARK-THEME.CSS.
    We are copy/pasting variables from light-theme and dark-theme,
    since they aren't loaded in this context (within browser.css). */
-:root[devtoolstheme="light"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar {
   --gcli-background-color: #fcfcfc;
   /* --theme-tab-toolbar-background */
   --gcli-input-background: #fcfcfc;
@@ -3007,7 +2992,7 @@ html|*.pointerlockfswarning-exit-button {
   --command-line-image-focus: url(chrome://devtools/skin/images/commandline-icon.svg#light-theme-focus);
   /* --theme-command-line-image-focus */ }
 
-:root[devtoolstheme="dark"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar {
   --gcli-background-color: #272b35;
   /* --theme-toolbar-background */
   --gcli-input-background: #272b35;
@@ -3045,8 +3030,8 @@ html|*.pointerlockfswarning-exit-button {
 .developer-toolbar-button > image {
   margin: auto 10px; }
 
-:root[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
-:root[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
+#browser-bottombox[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
   filter: invert(1); }
 
 .developer-toolbar-button > .toolbarbutton-icon {
@@ -3054,7 +3039,7 @@ html|*.pointerlockfswarning-exit-button {
   height: 16px; }
 
 /* The toolkit close button is low contrast in the dark theme so invert it. */
-:root[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
   filter: invert(1); }
 
 #developer-toolbar-toolbox-button {
@@ -3534,7 +3519,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   width: 20px;
   height: 20px;
   border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
+  background-image: url("chrome://browser/content/default-theme-icon.svg");
   background-size: contain; }
 
 #main-window[customize-entered] #customization-panel-container {
@@ -3671,7 +3656,7 @@ toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
   padding-inline-start: 0; }
 
 .customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png); }
+  list-style-image: url(chrome://browser/content/default-theme-icon.svg); }
 
 .customization-lwtheme-menu-theme[active="true"],
 .customization-lwtheme-menu-theme:hover {
@@ -4086,7 +4071,7 @@ notification.heartbeat {
   width: 16px; }
 
 /**
- * Override the --panel-arrowcontent-padding so the background extends
+ * Override the --arrowpanel-padding so the background extends
  * to the sides and bottom of the panel.
  */
 #UITourTooltipButtons {
@@ -4105,7 +4090,7 @@ notification.heartbeat {
   width: 16px;
   height: 16px;
   margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #context-back {
diff --git a/arc-firefox-theme/chrome/browser/sass/browser-light.css b/arc-firefox-theme/chrome/browser/sass/browser-light.css
index 6ccccc4..e3de08a 100644
--- a/arc-firefox-theme/chrome/browser/sass/browser-light.css
+++ b/arc-firefox-theme/chrome/browser/sass/browser-light.css
@@ -760,7 +760,7 @@ toolbarpaletteitem[place="palette"] > :-moz-any(#back-button, #forward-button, #
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
 :-moz-any(#back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #social-share-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button, #e10s-button, #panic-button, #webide-button, #containers-panelmenu)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #home-button[cui-areatype="menu-panel"],
@@ -1153,6 +1153,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
   visibility: visible; }
@@ -1162,12 +1165,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-  visibility: visible; }
-
 #identity-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/identity-icon.svg#normal-black); }
 
@@ -1197,6 +1194,9 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-secure.svg);
   visibility: visible; }
 
+#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
+#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme,
 #urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon:-moz-lwtheme {
   list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
   visibility: visible; }
@@ -1206,12 +1206,6 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
   list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon-black);
   visibility: visible; }
 
-#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon:-moz-lwtheme,
-#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon:-moz-lwtheme {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon-black);
-  visibility: visible; }
-
 #identity-box {
   --identity-box-verified-color: #479900;
   --identity-box-chrome-color: #e57300;
@@ -1280,9 +1274,10 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
 
 #identity-box[sharing] > #identity-icon,
 #sharing-icon {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear identity-box-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to tab-sharing-icon-pulse in tabs.inc.css */
+@keyframes identity-box-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -1330,24 +1325,13 @@ toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
    type of icon displayed. This rule must be defined before the others in order
    for its list-style-image to be overridden. */
 .notification-anchor-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-info?size=16); }
-
-@media (min-resolution: 1.1dppx) {
-  .notification-anchor-icon {
-    list-style-image: url(moz-icon://stock/gtk-dialog-info?size=dialog); } }
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px; }
+  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info); }
 
 .notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
 #blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8; }
-
 /* INDIVIDUAL NOTIFICATIONS */
 .popup-notification-icon[popupid="web-notifications"],
 .desktop-notification-icon {
@@ -1535,6 +1519,25 @@ html|*#webRTC-previewVideo {
 .addon-install-confirmation-name {
   font-weight: bold; }
 
+.addon-webext-perm-header {
+  font-size: 1.3em; }
+
+.addon-webext-name {
+  font-weight: bold;
+  margin: 0; }
+
+.addon-addon-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/menuPanel.svg");
+  -moz-image-region: rect(0px, 288px, 32px, 256px); }
+
+.addon-toolbar-icon {
+  width: 14px;
+  height: 14px;
+  list-style-image: url("chrome://browser/skin/Toolbar.png");
+  -moz-image-region: rect(0, 486px, 18px, 468px); }
+
 /* Notification icon box */
 .notification-anchor-icon:-moz-focusring {
   outline: 1px dotted -moz-DialogText; }
@@ -1732,12 +1735,12 @@ notification[value="translation"] menulist > .menulist-dropmarker {
   border-radius: 2px;
   border: 1px solid transparent; }
 
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight; }
-
 .ac-title {
   font-size: 1.05em; }
 
+.ac-separator,
+.ac-url,
+.ac-action,
 .ac-tags {
   font-size: 0.9em; }
 
@@ -1748,18 +1751,11 @@ html|span.ac-tag {
   border: 1px solid transparent;
   padding: 0 1px; }
 
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
+.ac-separator:not([selected=true]),
+.ac-url:not([selected=true]),
+.ac-action:not([selected=true]) {
   color: -moz-nativehyperlinktext; }
 
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important; }
-
 .ac-tags-text[selected] > html|span.ac-tag {
   background-color: HighlightText;
   color: Highlight; }
@@ -1775,26 +1771,14 @@ html|span.ac-emphasize-text-url {
 .ac-type-icon[type=bookmark][selected][current] {
   list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted"); }
 
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
+.ac-site-icon[type=searchengine] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon); }
 
 .ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
+.ac-site-icon[type=searchengine][selected] {
   list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted); }
 
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px; }
-
 .ac-type-icon[type=switchtab],
 .ac-type-icon[type=remotetab] {
   list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab"); }
@@ -2158,9 +2142,10 @@ html|span.ac-emphasize-text-url {
 
 .tab-icon-image[sharing]:not([selected]),
 .tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite; }
+  animation: 3s linear tab-sharing-icon-pulse infinite; }
 
-@keyframes pulse {
+/* This should remain identical to identity-box-sharing-icon-pulse in identity-block.inc.css */
+@keyframes tab-sharing-icon-pulse {
   0%, 16.66%, 83.33%, 100% {
     opacity: 0; }
   33.33%, 66.66% {
@@ -2236,7 +2221,7 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound[muted],
 .tab-icon-sound[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .tab-icon-sound[muted] {
@@ -2248,12 +2233,12 @@ html|span.ac-emphasize-text-url {
 .tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-darktext[muted],
 .tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px white); }
 
 .tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
 .tab-icon-sound:-moz-lwtheme-brighttext[muted],
 .tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
+  filter: url(chrome://global/skin/filters.svg#fill) drop-shadow(1px 1px 1px black); }
 
 .tab-icon-sound[soundplaying]:not(:hover),
 .tab-icon-sound[muted]:not(:hover),
@@ -2454,7 +2439,7 @@ lwtHeader;*/
 .alltabs-endimage[muted],
 .alltabs-endimage[blocked] {
   list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 .alltabs-endimage[muted] {
@@ -2987,7 +2972,7 @@ html|*.pointerlockfswarning-exit-button {
 /* NOTE: THESE NEED TO STAY IN SYNC WITH LIGHT-THEME.CSS AND DARK-THEME.CSS.
    We are copy/pasting variables from light-theme and dark-theme,
    since they aren't loaded in this context (within browser.css). */
-:root[devtoolstheme="light"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar {
   --gcli-background-color: #fcfcfc;
   /* --theme-tab-toolbar-background */
   --gcli-input-background: #fcfcfc;
@@ -3007,7 +2992,7 @@ html|*.pointerlockfswarning-exit-button {
   --command-line-image-focus: url(chrome://devtools/skin/images/commandline-icon.svg#light-theme-focus);
   /* --theme-command-line-image-focus */ }
 
-:root[devtoolstheme="dark"] #developer-toolbar {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar {
   --gcli-background-color: #272b35;
   /* --theme-toolbar-background */
   --gcli-input-background: #272b35;
@@ -3045,8 +3030,8 @@ html|*.pointerlockfswarning-exit-button {
 .developer-toolbar-button > image {
   margin: auto 10px; }
 
-:root[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
-:root[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
+#browser-bottombox[devtoolstheme="light"] #developer-toolbar > .developer-toolbar-button:not([checked=true]) > image,
+#browser-bottombox[devtoolstheme="light"] .gclitoolbar-input-node:not([focused=true])::before {
   filter: invert(1); }
 
 .developer-toolbar-button > .toolbarbutton-icon {
@@ -3054,7 +3039,7 @@ html|*.pointerlockfswarning-exit-button {
   height: 16px; }
 
 /* The toolkit close button is low contrast in the dark theme so invert it. */
-:root[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
+#browser-bottombox[devtoolstheme="dark"] #developer-toolbar > .close-icon:not(:hover) > image {
   filter: invert(1); }
 
 #developer-toolbar-toolbox-button {
@@ -3534,7 +3519,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   width: 20px;
   height: 20px;
   border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
+  background-image: url("chrome://browser/content/default-theme-icon.svg");
   background-size: contain; }
 
 #main-window[customize-entered] #customization-panel-container {
@@ -3671,7 +3656,7 @@ toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
   padding-inline-start: 0; }
 
 .customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png); }
+  list-style-image: url(chrome://browser/content/default-theme-icon.svg); }
 
 .customization-lwtheme-menu-theme[active="true"],
 .customization-lwtheme-menu-theme:hover {
@@ -4086,7 +4071,7 @@ notification.heartbeat {
   width: 16px; }
 
 /**
- * Override the --panel-arrowcontent-padding so the background extends
+ * Override the --arrowpanel-padding so the background extends
  * to the sides and bottom of the panel.
  */
 #UITourTooltipButtons {
@@ -4105,7 +4090,7 @@ notification.heartbeat {
   width: 16px;
   height: 16px;
   margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor; }
 
 #context-back {
diff --git a/arc-firefox-theme/chrome/browser/searchReset.css b/arc-firefox-theme/chrome/browser/searchReset.css
index 3573d7d..8005073 100644
--- a/arc-firefox-theme/chrome/browser/searchReset.css
+++ b/arc-firefox-theme/chrome/browser/searchReset.css
@@ -17,6 +17,6 @@ body {
   background-size: 16px, 16px;
 }
 
-#defaultEngine:-moz-dir(rtl) {
+#defaultEngine:dir(rtl) {
   background-position: calc(100% - 5px) center;
 }
diff --git a/arc-firefox-theme/chrome/browser/searchbar.css b/arc-firefox-theme/chrome/browser/searchbar.css
index cb4103d..a07413c 100644
--- a/arc-firefox-theme/chrome/browser/searchbar.css
+++ b/arc-firefox-theme/chrome/browser/searchbar.css
@@ -266,6 +266,11 @@ menuitem[cmd="cmd_clearhistory"][disabled] {
   color: HighlightText;
 }
 
+.addengine-item[type=menu][selected] {
+  color: inherit;
+  background-color: var(--arrowpanel-dimmed-further);
+}
+
 .addengine-icon {
   width: 16px;
 }
@@ -277,7 +282,8 @@ menuitem[cmd="cmd_clearhistory"][disabled] {
   list-style-image: url("chrome://browser/skin/badge-add-engine.png");
 }
 
-.addengine-item > .button-box > .button-text {
+.addengine-item > .button-box > .button-text,
+.addengine-item[type=menu] > .button-box > .box-inherit > .button-text {
   -moz-box-flex: 1;
   text-align: start;
   padding-inline-start: 10px;
@@ -297,6 +303,12 @@ menuitem[cmd="cmd_clearhistory"][disabled] {
   }
 }
 
+.addengine-item[type=menu] > .button-box > .button-menu-dropmarker {
+  display: -moz-box;
+  -moz-appearance: menuarrow !important;
+  list-style-image: none;
+}
+
 .search-panel-tree > .autocomplete-treebody::-moz-tree-cell {
   border-top: none !important;
 }
@@ -331,6 +343,6 @@ menuitem[cmd="cmd_clearhistory"][disabled] {
 
 .search-setting-button-compact > .button-box > .button-icon {
   list-style-image: url("chrome://browser/skin/gear.svg");
-  filter: url(chrome://browser/skin/filters.svg#fill);
+  filter: url(chrome://global/skin/filters.svg#fill);
   fill: currentColor;
 }
diff --git a/arc-firefox-theme/chrome/browser/social/gear_clicked.png b/arc-firefox-theme/chrome/browser/social/gear_clicked.png
deleted file mode 100644
index 7c93aa7..0000000
--- a/arc-firefox-theme/chrome/browser/social/gear_clicked.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/social/gear_default.png b/arc-firefox-theme/chrome/browser/social/gear_default.png
deleted file mode 100644
index 2a9c8e1..0000000
--- a/arc-firefox-theme/chrome/browser/social/gear_default.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/social/share-button-active.png b/arc-firefox-theme/chrome/browser/social/share-button-active.png
deleted file mode 100644
index 7df438d..0000000
--- a/arc-firefox-theme/chrome/browser/social/share-button-active.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/social/share-button.png b/arc-firefox-theme/chrome/browser/social/share-button.png
deleted file mode 100644
index c5298c1..0000000
--- a/arc-firefox-theme/chrome/browser/social/share-button.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/syncProgress-menuPanel.png b/arc-firefox-theme/chrome/browser/syncProgress-menuPanel.png
deleted file mode 100644
index 6fd6f9c..0000000
--- a/arc-firefox-theme/chrome/browser/syncProgress-menuPanel.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/syncProgress-menuPanel@2x.png b/arc-firefox-theme/chrome/browser/syncProgress-menuPanel@2x.png
deleted file mode 100644
index 04b2cae..0000000
--- a/arc-firefox-theme/chrome/browser/syncProgress-menuPanel@2x.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/syncProgress-toolbar-inverted.png b/arc-firefox-theme/chrome/browser/syncProgress-toolbar-inverted.png
deleted file mode 100644
index 4ede438..0000000
--- a/arc-firefox-theme/chrome/browser/syncProgress-toolbar-inverted.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/syncProgress-toolbar.png b/arc-firefox-theme/chrome/browser/syncProgress-toolbar.png
deleted file mode 100644
index 49e224f..0000000
--- a/arc-firefox-theme/chrome/browser/syncProgress-toolbar.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/theme-switcher-icon.png b/arc-firefox-theme/chrome/browser/theme-switcher-icon.png
deleted file mode 100644
index 891e7af..0000000
--- a/arc-firefox-theme/chrome/browser/theme-switcher-icon.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/theme-switcher-icon@2x.png b/arc-firefox-theme/chrome/browser/theme-switcher-icon@2x.png
deleted file mode 100644
index 286adfe..0000000
--- a/arc-firefox-theme/chrome/browser/theme-switcher-icon@2x.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/webRTC-camera-white-16.png b/arc-firefox-theme/chrome/browser/webRTC-camera-white-16.png
deleted file mode 100644
index e1e360b..0000000
--- a/arc-firefox-theme/chrome/browser/webRTC-camera-white-16.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/webRTC-indicator.css b/arc-firefox-theme/chrome/browser/webRTC-indicator.css
index c22f942..938d643 100644
--- a/arc-firefox-theme/chrome/browser/webRTC-indicator.css
+++ b/arc-firefox-theme/chrome/browser/webRTC-indicator.css
@@ -29,7 +29,7 @@ window {
 }
 
 #screenShareButton {
-  background-image: url("webRTC-screen-white-16.png");
+  background-image: url("chrome://browser/skin/notification-icons.svg#screen-indicator");
   background-position: center center;
   background-repeat: no-repeat;
   background-size: 16px;
@@ -61,17 +61,17 @@ window[sharingaudio] > #audioVideoButton {
 }
 
 window[sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png");
+  background-image: url("chrome://browser/skin/notification-icons.svg#camera-indicator");
 }
 
 window[sharingaudio] > #audioVideoButton {
-  background-image: url("webRTC-microphone-white-16.png");
+  background-image: url("chrome://browser/skin/notification-icons.svg#microphone-indicator");
 }
 
 /* Multi-icon button: */
 window[sharingaudio][sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png"),
-                    url("webRTC-microphone-white-16.png");
+  background-image: url("chrome://browser/skin/notification-icons.svg#camera-indicator"),
+                    url("chrome://browser/skin/notification-icons.svg#microphone-indicator");
   background-position: 6px center, 26px center;
   background-size: 16px, 16px;
   min-width: 46px;
diff --git a/arc-firefox-theme/chrome/browser/webRTC-microphone-white-16.png b/arc-firefox-theme/chrome/browser/webRTC-microphone-white-16.png
deleted file mode 100644
index 0091529..0000000
--- a/arc-firefox-theme/chrome/browser/webRTC-microphone-white-16.png
+++ /dev/null
diff --git a/arc-firefox-theme/chrome/browser/webRTC-screen-white-16.png b/arc-firefox-theme/chrome/browser/webRTC-screen-white-16.png
deleted file mode 100644
index 045bfd3..0000000
--- a/arc-firefox-theme/chrome/browser/webRTC-screen-white-16.png
+++ /dev/null