If you’re one of those people who are fond of skinning their stuff, then you’ve got to have the Personas add-on for Firefox.

What are personas?
Personas, according to its official site;

…are lightweight, easy-to-install and easy-to-change “skins” for your Firefox web browser.

Instead of having to download individual add-ons every time you want a new look for your Firefox, with Personas, all you have to do is point and click. Literally.

It works by installing an add-on on your Firefox browser which controls the appearance of your browser window. Whenever you visit the Personas gallery, the add-on detects events that allow it to change your browser’s look. By hovering your mouse over (or clicking) an item in the gallery, the add-on picks up details about the Persona, then automatically applies itself on your browser.

I’ve tried this add-on just recently, and honestly liked the way it changed my browser’s look. Plus, anyone can make his own Persona. Simply cool.

http://www.getpersonas.com/