Nerd entry alert.
I think people who come over sometimes believe I don’t have Firefox installed when they don’t see the familiar logo on the taskbar. You really think I would be using IE? Come on. Being a nerd, I use these custom Firefox builds that are optimized for particular processor sets that have a different icon. I haven’t done careful analysis to see if it’s faster, but it seems it. Plus it’s nerd-cool. Anyway, I kind of recommend it.