--- a/browser/base/content/browser.css
+++ b/browser/base/content/browser.css
@@ -247,26 +247,22 @@ window[chromehidden~="toolbar"] toolbar:
 #identity-popup-content-box.unknownIdentity > #identity-popup-content-host ,
 #identity-popup-content-box.unknownIdentity > #identity-popup-content-owner ,
 #identity-popup-content-box.verifiedIdentity > #identity-popup-connectedToLabel2 ,
 #identity-popup-content-box.verifiedDomain > #identity-popup-connectedToLabel2 {
   display: none;
 }
 
 /*  Full Screen UI */
+
 #fullscr-toggler {
-  display: none;
-  min-height: 1px;
   height: 1px;
   background: black;
-  border-style: none;
-  -moz-appearance: none;
 }
 
-#navigator-toolbox[inFullscreen="true"] > #fullscr-toggler,
 #nav-bar[mode="text"] > #window-controls > toolbarbutton > .toolbarbutton-icon {
   display: -moz-box;
 }
 
 #nav-bar[mode="text"] > #window-controls > toolbarbutton > .toolbarbutton-text {
   display: none;
 }
 

--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -3513,22 +3513,20 @@ var FullScreen =
     document.getElementById("View:FullScreen").setAttribute("checked", !window.fullScreen);
 
     if (!window.fullScreen) {
       // Add a tiny toolbar to receive mouseover and dragenter events, and provide affordance.
       // This will help simulate the "collapse" metaphor while also requiring less code and
       // events than raw listening of mouse coords.
       let fullScrToggler = document.getElementById("fullscr-toggler");
       if (!fullScrToggler) {
-        fullScrToggler = document.createElement("toolbar");
+        fullScrToggler = document.createElement("hbox");
         fullScrToggler.id = "fullscr-toggler";
-        fullScrToggler.setAttribute("customizable", "false");
-        fullScrToggler.setAttribute("moz-collapsed", "true");
-        var navBar = document.getElementById("nav-bar");
-        navBar.parentNode.insertBefore(fullScrToggler, navBar);
+        fullScrToggler.collapsed = true;
+        gNavToolbox.parentNode.insertBefore(fullScrToggler, gNavToolbox.nextSibling);
       }
       fullScrToggler.addEventListener("mouseover", this._expandCallback, false);
       fullScrToggler.addEventListener("dragenter", this._expandCallback, false);
 
       if (gPrefService.getBoolPref("browser.fullscreen.autohide"))
         gBrowser.mPanelContainer.addEventListener("mousemove",
                                                   this._collapseCallback, false);
 
@@ -3719,22 +3717,18 @@ var FullScreen =
       gBrowser.mPanelContainer.addEventListener("mousemove",
                                                 this._collapseCallback, false);
     }
     else {
       gBrowser.mPanelContainer.removeEventListener("mousemove",
                                                    this._collapseCallback, false);
     }
 
-    var allFSToolbars = document.getElementsByTagNameNS(this._XULNS, "toolbar");
-    for (var i = 0; i < allFSToolbars.length; i++) {
-      if (allFSToolbars[i].getAttribute("fullscreentoolbar") == "true")
-        allFSToolbars[i].setAttribute("moz-collapsed", !aShow);
-    }
-    document.getElementById("fullscr-toggler").setAttribute("moz-collapsed", aShow);
+    gNavToolbox.collapsed = !aShow;
+    document.getElementById("fullscr-toggler").collapsed = aShow;
     this._isChromeCollapsed = !aShow;
     if (gPrefService.getIntPref("browser.fullscreen.animateUp") == 2)
       this._shouldAnimate = true;
   },
 
   showXULChrome: function(aTag, aShow)
   {
     var els = document.getElementsByTagNameNS(this._XULNS, aTag);

--- a/browser/themes/winstripe/browser/browser-aero.css
+++ b/browser/themes/winstripe/browser/browser-aero.css
@@ -48,17 +48,17 @@
     border-right: 1px solid ThreeDShadow;
   }
 
   /* Make the window draggable by glassed toolbars (bug 555081) */
   #toolbar-menubar:not([autohide="true"]),
   #navigator-toolbox[tabsontop="true"] > #TabsToolbar,
   #navigator-toolbox:not([tabsontop="true"]) > #nav-bar,
   #navigator-toolbox:not([tabsontop="true"]) > #nav-bar + #customToolbars + #PersonalToolbar[collapsed="true"] + #TabsToolbar:last-child,
-  #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#fullscr-toggler):-moz-lwtheme {
+  #navigator-toolbox > toolbar:not(#toolbar-menubar):-moz-lwtheme {
     -moz-binding: url("chrome://global/content/bindings/toolbar.xml#toolbar-drag");
   }
 
   #browser:not(:-moz-lwtheme),
   #browser-bottombox:not(:-moz-lwtheme) {
     background-color: -moz-dialog;
   }