I've tried Foxfire on two occasions now and for some reason I find it "lacking." It's hard to pinpoint the exact reason but I keep returning to IE. I do keep Windows XP Pro and IE patched and have never experienced problems.
Probably the convinience of tabbed browsing that bothers you. Microsoft has even admitted that some of their employees use Mozilla.
I posted a similar comment a couple of weeks ago and was pretty much branded a computer nitwit, neophite, simpleton, too stupid to understand, idiot, etc. In fact, just the opposite is true, Because I know what I'm doing, I have had very very few problems with spyware, adware, malware, viruses and other security threats. Maybe its the simple things I do like actually using a firewall and antivirus software that also blocks popups, and keeping the program up-to-date; running Adaware, Spybot S & D, and Spywareblaster on a regular basis and keeping those programs up to date; ignoring email from strangers; effectively using spam filters, etc. Unfortunately, there are too many people who view their computer as just another appliance and they really don't have a clue about the most basic security precautions.
I can't say that I won't ever use Firefox again, but in my opinion, the hype is better than the product.