diff --git a/src/browser/base/content/zen-styles/zen-browser-ui.css b/src/browser/base/content/zen-styles/zen-browser-ui.css
index 67447528e..691edcd68 100644
--- a/src/browser/base/content/zen-styles/zen-browser-ui.css
+++ b/src/browser/base/content/zen-styles/zen-browser-ui.css
@@ -50,6 +50,7 @@
 
 #zen-main-app-wrapper {
   background: transparent;
+  overflow: hidden;
   
   & > * {
     z-index: 1;