One of the negative side effects of a new version of Firefox rolling out is the fact that some Firefox theme creators neglect to update their themes to the newest versions. So, when updating our browser, that leaves some of us in the dark, when it comes to using the themes we know and love. However, this time around many more popular themes have been updated to support Firefox 3.5 and here are my favorite ten for you to choose from.
Silvermel

Gradient iCool (Blue)

Noia 2.0 (eXtreme)

NASA Night Launch

Vista-aero

myFireFox

Chromifox Extreme

MidnightFox

Phoenity Reborn

Kempelton

Has your favorite Firefox theme been updated yet? If so, let me know what it is and how much you like it in the comments. If not, then it might be time to write a very polite, yet persuasive, e-mail to your favorite theme author to ask him or her to roll out an update.
source : http://www.firefoxfacts.com/2009/07/06/10-popular-themes-that-are-firefox-3-5-ready/
Silvermel

Gradient iCool (Blue)

Noia 2.0 (eXtreme)

NASA Night Launch

Vista-aero

myFireFox

Chromifox Extreme

MidnightFox

Phoenity Reborn

Kempelton

Has your favorite Firefox theme been updated yet? If so, let me know what it is and how much you like it in the comments. If not, then it might be time to write a very polite, yet persuasive, e-mail to your favorite theme author to ask him or her to roll out an update.
source : http://www.firefoxfacts.com/2009/07/06/10-popular-themes-that-are-firefox-3-5-ready/