diff --git a/js/tabiframe.js b/js/tabiframe.js
index 0f669b5..1f13564 100644
--- a/js/tabiframe.js
+++ b/js/tabiframe.js
@@ -67,12 +67,14 @@ define(['js/eventemitter'], function(EventEmitter) {
   };
 
   tabIframeProto._createInnerIframe = function() {
+    let root = this.createShadowRoot();
     let iframe = document.createElement('iframe');
     iframe.setAttribute('mozbrowser', 'true');
     iframe.setAttribute('flex', '1');
     iframe.setAttribute('remote', 'true');
     iframe.setAttribute('mozallowfullscreen', 'true');
-    this.appendChild(iframe);
+    root.appendChild(iframe);
+    
     for (let eventName of IFRAME_EVENTS) {
       iframe.addEventListener(eventName, this);
     }