I'm not quite sure what you mean because I've not used the default Firefox skin for a long time. You can change almost every aspect of the Firefox UI by editing

I'm not quite sure what you mean because I've not used the default Firefox skin for a long time. You can change almost every aspect of the Firefox UI by editing your userChrome.css file, for which there are tutorials online. If you need some help figuring this out I could check it out later