diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index 349000f..3f0bbdd 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -1222,10 +1222,11 @@
         */
     }
 
-    /* Fallback background */
+    /* Fallback background - Set to Legacy. It will be removed Next update
     menupopup:not(.cui-widget-panel.cui-widget-panelview, [placespopup="true"]) {
       background-color: var(--lwt-accent-color, var(--in-content-page-background)) !important;
     }
+    */
   }
   /* Default theme color preservation */
   :root[lwtheme-mozlightdark] menupopup:not(#BMB_bookmarksPopup, [placespopup="true"]),
diff --git a/src/theme/_fully_color.scss b/src/theme/_fully_color.scss
index db4d31b..94e98bc 100644
--- a/src/theme/_fully_color.scss
+++ b/src/theme/_fully_color.scss
@@ -40,10 +40,11 @@ html#main-window menupopup:not(.in-menulist) {
       */
   }
 
-  /* Fallback background */
+  /* Fallback background - Set to Legacy. It will be removed Next update
   menupopup:not(.cui-widget-panel.cui-widget-panelview, [placespopup="true"]) {
     background-color: var(--lwt-accent-color, var(--in-content-page-background)) !important;
   }
+  */
 }
 
 /* Default theme color preservation */