diff --git a/options/options.css b/options/options.css
index cd9cfa26..468e1a39 100644
--- a/options/options.css
+++ b/options/options.css
@@ -33,6 +33,11 @@ body {
   }
 }
 
+.firefox body {
+  /* match the default FF theme */
+  background-color: #f9f9fa;
+}
+
 .firefox .chromium-only {
   display: none;
 }