My site statistics show that IE, followed by firefox. I do not understand why the firefox accounted for such a large proportion in your site? Are the contents of the site are related?
Sadly enough for me is IE6, that "rotting piece of code" Then FF, some opera, although i have a few Wordpress blogs some new templates and stuff used on more modern sites are a problem since it's rendering engine isn't capable to deal with. It's awkward as people still use that.
mine top is firefox then IE then everything else. i myself use them all to check compatibility of my blog
Heres my Stats: 1) Firefox, 2) Safari, 3) Opera 4) IE. Seems IE comes out bottom for me, and this is overall on my website which gets a pretty decent amount of hits.