Now you can personalize your Firefox with Personas for Firefox.
Personas for Firefox is a extension that adds lightweight theming to your browser."Personas is a prototype that builds upon the ideas that:
* themes today are too hard to find, install and use
* graphic designers should be able to style the browser without having to code
* browsers can be more than just desktop software, they can include online components
* people just want their computer to be a little more fun and personal"
To use Personas for Firefox install the extension through the link below, restart your Firefox and change your theme on the personas link at the bottom left of your browser.
Link to Personas Firefox