Huji Huji

https://addons.mozilla.org/en-US/firefox/addon/4296

Gradient Sepia

Updated at By Huji Huji
Gradient Sepia is a Firefox extension that changes the interface to a seamless gradient with a subtle sepia tone. It requires version 2.0 or later of the Firefox browser.

Gradient Gray

Updated at By Huji Huji
Gradient Gray is a browser extension that adds a seamless silver gradient to your web browser. It requires Firefox 2.0 or later.

Aged Wood

Updated at By Huji Huji
The Aged Wood Firefox theme adds a touch of sepia to your browser interface, giving it a classic look. It requires Firefox version 2.0 or later.