diff --git a/browser/themes/linux/browser.css b/browser/themes/linux/browser.css
index b82fa7229ad637a08563c06fa2c2abdf99998d7c..b5ee3aa9679244222a0e9eed4be54a41ec6a11f9 100644
--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -14,7 +14,6 @@
     @media (-moz-gtk-theme-family) {
       --tabs-navbar-separator-style: none;
       @media (prefers-color-scheme: light) {
-        --urlbar-box-bgcolor: #fafafa;
       }
     }
   }
@@ -59,6 +58,8 @@
       appearance: auto;
 
       body,
+      #zen-main-app-wrapper,
+      #zen-browser-background,
       dialog::backdrop {
         border-top-left-radius: env(-moz-gtk-csd-titlebar-radius);
         border-top-right-radius: env(-moz-gtk-csd-titlebar-radius);
