diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index 5ba49b6..0166d6a 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -1298,6 +1298,10 @@
       var(--menuitem-hover-background-color) 40%,
       transparent
     ) !important;
+    /* Above FF v105 #466 */
+    --panel-color: var(--menu-color) !important;
+    --panel-background: var(--menu-background-color) !important;
+    --panel-border-color: var(--menu-border-color) !important;
   }
 
   @media not all and (-moz-gtk-csd-available) {
diff --git a/src/theme/_fully_color.scss b/src/theme/_fully_color.scss
index b13d4ad..1904056 100644
--- a/src/theme/_fully_color.scss
+++ b/src/theme/_fully_color.scss
@@ -19,6 +19,11 @@ html#main-window menupopup:not(.in-menulist) {
     var(--menuitem-hover-background-color) 40%,
     transparent
   ) !important;
+
+  /* Above FF v105 #466 */
+  --panel-color: var(--menu-color) !important;
+  --panel-background: var(--menu-background-color) !important;
+  --panel-border-color: var(--menu-border-color) !important;
 }
 
 // TODO: `OS` not covered case