diff --git a/webextension/css/popup.css b/webextension/css/popup.css
index e86a7d1..845d519 100644
--- a/webextension/css/popup.css
+++ b/webextension/css/popup.css
@@ -12,6 +12,7 @@
 }
 
 html {
+  background-color: #fefefe;
   box-sizing: border-box;
   font-size: 12px;
 }