I use IE and Firefox actually...both for different reasons or when one is jamming up Ilaunch the other.
The last reply to this thread before today was on March 15th, 2008. Google Chrome wasn't released yet. I prefer FireFox .
I use firefox mostly and sometimes IE, because sometimes firefox getting unavailable to use for some sites, but nowadays it is seen that firefox have more security issues than IE.
Currently , Firefox 3.5.5 I'm a Firefox veteran, I remember it used to be Mozilla. Themes I'm using is the Noia 2.0 Extreme. Love it!