diff --git a/content/dark_settings_pages.css b/content/dark_settings_pages.css
index 62fae11..1b68025 100644
--- a/content/dark_settings_pages.css
+++ b/content/dark_settings_pages.css
@@ -39,7 +39,7 @@
     fill : CurrentColor !important;
   }
   /* make panel background blurry if the background is translucent. Requires pref layout.css.backdrop-filter.enabled  */
-  panel-list{ backdrop-filter: blur(28px) }
+  html|panel-list{ backdrop-filter: blur(28px) }
 }
 
 /* Get addons page */