diff --git a/browser/themes/osx/browser.css b/browser/themes/osx/browser.css
index ce08744bee55..e1a95c15369a 100644
--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -267,10 +267,10 @@
               0 0 0 1px var(--toolbar-field-focus-border-color);
 }
 
-#urlbar[breakout][breakout-extend]:not(.hidden-focus)[focused="true"] > #urlbar-background {
+#urlbar.megabar[breakout][breakout-extend]:not(.hidden-focus)[focused="true"] > #urlbar-background {
   box-shadow: 0 0 0 1px var(--toolbar-field-focus-border-color) inset,
               0 0 0 1px var(--toolbar-field-focus-border-color),
-              0 4px 16px rgba(0, 0, 0, 0.1);
+              0 5px 18px rgba(0, 0, 0, .2);
 }
 
 %include ../shared/identity-block/identity-block.inc.css