diff --git a/src/popup.html b/src/popup.html
index 78f376b19..493808009 100644
--- a/src/popup.html
+++ b/src/popup.html
@@ -1,5 +1,5 @@
 ﻿<!DOCTYPE html>
-<html>
+<html id="uBO-popup-panel">
 
 <head>
 <meta name="viewport" content="width=470"><!-- When showing as a tab in fennec, scale to full size (150px + 320px) -->
