I too have been hearing how great Firefox is. Truth be told, I prefer Mozilla, since it seems to render more web pages better than Firefox overall. I also use & will continue to use IE, simply because it offers so much more than either alternative browser, security issues notwithstanding. The only true plusses to the others are the tabbed browsing feature & relative security, but I can find really no other reason for using the others. I've also tried Opera, which is ok, but I really don't like it as much as either FF or Mozilla. I noticed that someone mentioned "bloat" in this thread, but you know, with all the extras that Mozilla includes (E-mail, HTML, etc.), it still doesn't compare with IE's bloat. Besides, with today's hard drives, who cares about a few Mb here & there. By the time you add Thunderbird & all the extensions to FF, you've got the Mozilla suite in terms of space used anyway.
I mentioned in one of the earlier discussions on these browsers that I am a professional chauffeur on a part time basis (in addition to running my own PC business from my home), & I have yet to find a browser that renders maps as well as IE does (& I don't just mean at MSN Maps, but the Rand McNally site as well), & until someone comes up with a browser that does ALL the things I need it to do, I will stick mainly with IE & use Mozilla for other necessities, while I continue to test drive these other browsers like FF. It's really too bad that the Mozilla org. is "giving up" on it's flagship product, since it is mostly "ready for prime time", while the other pretenders try to play catch-up. Oh well, such is the way of the tech world...