Stylish is a Firefox and Thunderbird extension that lets you install and manage user styles. If you don't have it already, go get it; it's free!Stylish allows easy management of user styles.
Change the look of your Firefox browser. A dark and hot theme for Firefox 3. Fully skinned, every window and menu.Custom throbbers and toolbar icons. Cool animations on scrollbars and progressbar. Compatible with a long list of popular extensions.