I think this don't really work as a combo box on firefox, more like auto complete. It is some what a replacement on chrome, because chrome decide to show it wi

I think this don't really work as a combo box on firefox, more like auto complete. It is some what a replacement on chrome, because chrome decide to show it with arrow point to bottom. And in both firefox and chrome. It don't even have a indicator display by default to tell you "you are supposed to select it, not type it" or "Type yourself is invalid, you need to use predefined options".