+@supports ( -moz-appearance: -moz-mac-unified-toolbar ) {
+ /* this is a usable workaround to detect we're on Mac OS */
+ toolbar[customizable="true"]:not([nowindowdrag="true"]) {
+ -moz-binding: url("chrome://global/skin/globalBindings.xml#toolbar-drag-browsercustom");
+ }
+}
+