Firefox is more stable unlike IE with lots of problem that i encountered... Some time ago i'm an avid IE user but now I've switched to FF since it helps me a lot in optimizing (SEO).. LOts of plugins and add-ons...
I have IE7 installed. I use it to check for compatibility of sites that I build. Other than that, I only use it for sites that cause bugs in Firefox.
I only use IE, imo FF takes too long to start up. I only use FF when I check to see if my sites are displaying properly on it.
IE 6 is where its at, nice and plain. Cant stand IE 7, if I accidently upgraded then I'd use firefox for more than testing and some wp plugins that dont operate on IE.
I use FF2 for main browsing. I use IE7 configured to use a proxy (paid service) when I need a different (mostly United States based) IP address which is actually quite often.
o.0 Lol, I'm ignorant. I didn't even know they have a IE8 BETA. I do use IE ... for web designing. Since well, many users actually are still using IE.
I imagine that might be the worst time since there are viruses lurking about...not that I would know ha-ha, I was like is that my PB image