Bug 868410 - Fix jumbled up and uncustomizable nav-bar on OSX. r=jaws.

browser/base/content/browser.css

@@ -17,6 +17,12 @@ toolbar[customizable="true"] {
   -moz-binding: url("chrome://browser/content/customizableui/toolbar.xml#toolbar");
 }
 
+%ifdef XP_MACOSX
+toolbar[customizable="true"]:not([nowindowdrag="true"]) {
+  -moz-binding: url("chrome://browser/content/customizableui/toolbar.xml#toolbar-drag");
+}
+%endif
+
 #toolbar-menubar[autohide="true"] {
   -moz-binding: url("chrome://browser/content/customizableui/toolbar.xml#toolbar-menubar-autohide");
 }