--- a/browser/themes/shared/compacttheme.inc.css
+++ b/browser/themes/shared/compacttheme.inc.css
@@ -3,17 +3,16 @@
 % file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 /* 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 compacttheme.css files. */
 
 :root:-moz-lwtheme {
   --toolbar-bgcolor: var(--chrome-secondary-background-color);
-  --toolbar-gbimage: none;
   --toolbar-non-lwt-bgcolor: var(--toolbar-bgcolor);
   --toolbar-non-lwt-textcolor: var(--chrome-color);
   --toolbar-non-lwt-bgimage: none;
 
   --toolbarbutton-icon-fill-opacity: .7;
 }
 
 :root:-moz-lwtheme-brighttext {