I tried FireFox and liked it for the most part, but found many pages online didn't display the way they should (and did using IE). After a little research, it turns out the the script and coding rules for viewing pages thru IE are very dynamic whereas FireFox has set rules for the viewing scripts and the way the code of the particular site is written and when it doesn't match up, the display and layout is thrown off in FireFox.
Obviously the more popular that FireFox and other 3rd party browsers become, the more online websites will need to conform their scripts for proper display so perhaps I'll get FireFox again down the road but for now I'm sticking with MyIE2 here
which uses the tab feature that everyone loves about FireFox.
Speed seems to be comparable to FireFox too from what I can tell.