new file mode 100644
--- /dev/null
+++ b/browser/themes/shared/icons/synced-tabs.svg
@@ -0,0 +1,6 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 32 32">
+  <path fill="context-fill" d="M29.98,28h-28a2,2,0,0,1-2-2V22a2,2,0,0,1,2-2H2c4.591,0,4-3,4.009-8,0.009-4.686.166-8,6.261-8h7.41c6.13,0,6.27,3.314,6.3,8,0.02,5-.59,8,4.02,8h-0.02a2,2,0,0,1,2,2v4A2,2,0,0,1,29.98,28Z"/>
+</svg>

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -146,16 +146,17 @@
   skin/classic/browser/quit.svg                       (../shared/icons/quit.svg)
   skin/classic/browser/reload.svg                     (../shared/icons/reload.svg)
   skin/classic/browser/save.svg                       (../shared/icons/save.svg)
   skin/classic/browser/settings.svg                   (../shared/icons/settings.svg)
   skin/classic/browser/share.svg                      (../shared/icons/share.svg)
   skin/classic/browser/sidebars.svg                   (../shared/icons/sidebars.svg)
   skin/classic/browser/stop.svg                       (../shared/icons/stop.svg)
   skin/classic/browser/sync.svg                       (../shared/icons/sync.svg)
+  skin/classic/browser/synced-tabs.svg                (../shared/icons/synced-tabs.svg)
   skin/classic/browser/webIDE.svg                     (../shared/icons/webIDE.svg)
   skin/classic/browser/zoom-in.svg                    (../shared/icons/zoom-in.svg)
   skin/classic/browser/zoom-out.svg                   (../shared/icons/zoom-out.svg)
 
 
   skin/classic/browser/search-indicator.png                    (../shared/search/search-indicator.png)
   skin/classic/browser/search-indicator@2x.png                 (../shared/search/search-indicator@2x.png)
   skin/classic/browser/search-engine-placeholder.png           (../shared/search/search-engine-placeholder.png)

--- a/browser/themes/shared/sidebar.inc.css
+++ b/browser/themes/shared/sidebar.inc.css
@@ -123,13 +123,13 @@
   list-style-image: url(chrome://browser/skin/history.svg);
   -moz-context-properties: fill;
   fill: currentColor;
   opacity: 0.8;
 }
 
 #sidebar-switcher-tabs > .toolbarbutton-icon,
 #sidebar-box[sidebarcommand="viewTabsSidebar"] > #sidebar-header > #sidebar-switcher-target > #sidebar-icon {
-  list-style-image: url(chrome://browser/skin/sync.svg);
+  list-style-image: url(chrome://browser/skin/synced-tabs.svg);
   -moz-context-properties: fill;
   fill: currentColor;
   opacity: 0.8;
 }

--- a/browser/themes/shared/toolbarbutton-icons.inc.css
+++ b/browser/themes/shared/toolbarbutton-icons.inc.css
@@ -82,17 +82,17 @@ toolbar:not([brighttext]) #bookmarks-men
   list-style-image: url("chrome://browser/skin/open.svg");
 }
 
 #save-page-button[cui-areatype="toolbar"] {
   list-style-image: url("chrome://browser/skin/save.svg");
 }
 
 #sync-button[cui-areatype="toolbar"] {
-  list-style-image: url("chrome://browser/skin/sync.svg");
+  list-style-image: url("chrome://browser/skin/synced-tabs.svg");
 }
 
 #containers-panelmenu[cui-areatype="toolbar"] {
   list-style-image: url("chrome://browser/skin/containers.svg");
 }
 
 #feed-button[cui-areatype="toolbar"] {
   list-style-image: url("chrome://browser/skin/feed.svg");