--- a/browser/themes/shared/toolbarbuttons.inc.css
+++ b/browser/themes/shared/toolbarbuttons.inc.css
@@ -362,17 +362,17 @@ toolbar[brighttext] .toolbarbutton-1 > .
 }
 
 /* bookmarks menu-button */
 
 #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker {
   -moz-appearance: none !important;
 }
 
-#bookmarks-menu-button[cui-areatype="toolbar"]:not([overflowedItem=true]) > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
+#nav-bar #bookmarks-menu-button[cui-areatype="toolbar"]:not([overflowedItem=true]) > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
   padding-top: var(--toolbarbutton-vertical-inner-padding);
   padding-bottom: var(--toolbarbutton-vertical-inner-padding);
 }
 
 #BMB_bookmarksPopup[side="top"],
 #BMB_bookmarksPopup[side="bottom"] {
   margin-left: -20px;
   margin-right: -20px;