--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -1014,20 +1014,16 @@ menuitem:not([type]):not(.menuitem-toolt
 #notification-popup-box {
   border-radius: 2.5px 0 0 2.5px;
 }
 
 .notification-anchor-icon:-moz-focusring {
   outline: 1px dotted -moz-DialogText;
 }
 
-.indexedDB-icon {
-  list-style-image: url(moz-icon://stock/gtk-dialog-question?size=16);
-}
-
 /* Translation infobar */
 
 %include ../shared/translation/infobar.inc.css
 
 notification[value="translation"] {
   min-height: 40px;
 }