diff --git a/modules/zen-browser/userChrome.nix b/modules/zen-browser/userChrome.nix
index d87d5732..7a719111 100644
--- a/modules/zen-browser/userChrome.nix
+++ b/modules/zen-browser/userChrome.nix
@@ -125,8 +125,8 @@ with colors;
     --identity-icon-color: #${base0F-hex} !important;
   }
 
-  hbox#titlebar {
-    background-color: #${base00-hex} !important;
+  #navigator-toolbox {
+    --zen-main-browser-background-toolbar: #${base00-hex} !important;
   }
 
   #zen-appcontent-navbar-container {