diff --git a/browser/metro/base/content/browser.js b/browser/metro/base/content/browser.js
index a954ccc29e72..b96845041031 100644
--- a/browser/metro/base/content/browser.js
+++ b/browser/metro/base/content/browser.js
@@ -1312,9 +1312,6 @@ Tab.prototype = {
       self._eventDeferred = null;
     }
     browser.addEventListener("pageshow", onPageShowEvent, true);
-    browser.addEventListener("DOMWindowCreated", this, false);
-    Elements.browsers.addEventListener("SizeChanged", this, false);
-
     browser.messageManager.addMessageListener("Content:StateChange", this);
     Services.obs.addObserver(this, "metro_viewstate_changed", false);
 
@@ -1323,20 +1320,6 @@ Tab.prototype = {
     this._loadUsingParams(browser, aURI, aParams);
   },
 
-  updateViewport: function (aEvent) {
-    // <meta name=viewport> is not yet supported; just use the main window size.
-    this.browser.setWindowSize(window.innerWidth, window.innerHeight);
-  },
-
-  handleEvent: function (aEvent) {
-    switch (aEvent.type) {
-      case "DOMWindowCreated":
-      case "SizeChanged":
-        this.updateViewport();
-        break;
-    }
-  },
-
   receiveMessage: function(aMessage) {
     switch (aMessage.name) {
       case "Content:StateChange":
@@ -1365,8 +1348,6 @@ Tab.prototype = {
 
   destroy: function destroy() {
     this._browser.messageManager.removeMessageListener("Content:StateChange", this);
-    this._browser.removeEventListener("DOMWindowCreated", this, false);
-    Elements.browser.removeEventListener("SizeChanged", this, false);
     Services.obs.removeObserver(this, "metro_viewstate_changed", false);
     clearTimeout(this._updateThumbnailTimeout);