This should not be new for you that Firefox is a fastest growing popular web browser. There are lots of ease provided by the firefox and this is the main reason for its popularity. There are lots of free download able extensions, add-ons, themes etc available on the internet for firefox and there demands are increasing every day. As we have already published a post about Firefox add-ons. In this post, I am listing down 11 Free Firefox 3 Themes You Probably Never Use Before.
You are welcome to share if you know more nice and beautiful firefox themes that that can be attracted by our readers/viewers.
Chromifox

A coat of Chrome for Firefox. Say hello to Chromifox, a bright and soft blue theme for Firefox 3 on Windows, Linux, and Mac OS X, inspired by the appearance of the Google Chrome web browser.
Microsoft Office

Firefox theme based on Microsoft Office icons.
Phoenity Modern

Phoenity based on the SeaMonkey Modern theme. For Firefox 3 and Firefox 2.
FOXSCAPE

A full featured retro theme for Firefox based on Netscape Communicator 4.8 on Windows.
Flook Theme

Flook Theme for Mozilla Firefox based on Flock.
myFireFox

Myfirefox is the theme of the most perfectly simulating Internet Explorer 7+ by far. It can work perfectly in Windows Vista Ultimate.
GrApple Delicious

This theme is designed to fit well in the Mac OS X environment. It looks more similar as the Mac Operating System theme.
Mattahan

This is very simple and elegant theme for firefox using mini icons. All credits go 2 Mattahan for his wonderfull icons.
Modern Modoki

This theme is Modern Modoki theme looks like Netscape 8.
PimpZilla

Probably the most tacky & overdone piece of GUI design ever. Accept no less: Surf in style and browse like a king!
Gradient iCool

This is a glowing dark theme based on Windows Media Player 11 with shinny glassy look.
www.smashingapps.com/2008/09/28/11-free-firefox-3-themes-you-probably-never-use-before.html