Bug 598676 - Error: this._browser is undefined [r=mfinkle]

mobile/chrome/content/bindings/browser.xml

@@ -352,7 +352,7 @@
             // (as opposed to one of its iframes).
             if (this.feeds && aMessage.target == this)
               this.feeds = null;
-            this._browser.scale = 1;
+            this.scale = 1;
          ]]>
         </body>
       </method>