diff --git a/zentheme/userChrome.css b/zentheme/userChrome.css
index c1df650..e94ff68 100644
--- a/zentheme/userChrome.css
+++ b/zentheme/userChrome.css
@@ -23,6 +23,7 @@
         --toolbar-bgcolor: #313244 !important;
         --newtab-background-color: #1e1e2e !important;
         --zen-themed-toolbar-bg: #181825 !important;
+        --zen-main-browser-background: #181825 !important;
     }
 
     #permissions-granted-icon{
@@ -92,6 +93,7 @@
         --toolbar-bgcolor: #ccd0da !important;
         --newtab-background-color: #eff1f5 !important;
         --zen-themed-toolbar-bg: #e6e9ef !important;
+        --zen-main-browser-background: #e6e9ef !important;
     }
 
     #permissions-granted-icon{