Mozilla Firefox claims to be fast, private and free. however in recent months, it's becoming a nag to deal with. If you care about extensions, and overall ease of use, you may be interested to know, there's a compatibal browser out there that's like Firefox, but works just as well if not better.
I'm all about promoting stable software. If out with the old, and in with the new is your thing. By all means, stay with Firefox. But if you're picky about what you want, and you want it to do its job and work well, check this out.