diff --git a/browser/themes/shared/browser-shared.css b/browser/themes/shared/browser-shared.css
index b4854731c08b2f463751bb907cb44130ee6b6d2a..18d96cb457f5e57ed00b4eec6d2702287bfc72c7 100644
--- a/browser/themes/shared/browser-shared.css
+++ b/browser/themes/shared/browser-shared.css
@@ -147,8 +147,6 @@ body {
    */
   &.fullscreen-with-menubar {
     z-index: var(--browser-area-z-index-toolbox-while-animating);
-    box-shadow: var(--content-area-shadow);
-    border-bottom-color: var(--chrome-content-separator-color);
   }
 
   /* Themes define a set of toolbox foreground and background colors which we