diff --git a/browser/metro/base/content/browser.js b/browser/metro/base/content/browser.js
index 7730de3a667..a74e21c38c0 100644
--- a/browser/metro/base/content/browser.js
+++ b/browser/metro/base/content/browser.js
@@ -1143,9 +1143,12 @@ Browser.MainDragger.prototype = {
   },
 
   _hideScrollbars: function _hideScrollbars() {
-    this._scrollScales.x = 0, this._scrollScales.y = 0;
+    this._scrollScales.x = 0;
+    this._scrollScales.y = 0;
     this._horizontalScrollbar.removeAttribute("panning");
     this._verticalScrollbar.removeAttribute("panning");
+    this._horizontalScrollbar.removeAttribute("width");
+    this._verticalScrollbar.removeAttribute("height");
     this._horizontalScrollbar.style.MozTransform = "";
     this._verticalScrollbar.style.MozTransform = "";
   }