Both are good browser that's why I have IE and Firfox as well when IE. althoug firefox is really faster than IE.
IE7 for me. It's much faster than anything else. I use Opera for backup. I refuse to even install FF on my computer again. And this coming form someone who has 3.5GB of RAM. Also, for everyone saying IE won't install for them, it just takes a long time. You think the install has hung, but in reality it just takes a really long time. If you just wait, it does install. Second thing, I see a lot of these comments: "Fire IS the best browser because of its tab fuctions" IE7 does have tabs in case ya didn't know. =o
FF is the best .... FF has lot of plugins which are really helpful for web developers like me.... while IE sucks..
I have become spoiled with Firefox, IE just doesn't cut it anymore. Everything is faster with Firefox and the pages are much better to view.
IE consistently asks for a Flash Player plug in even after installing it gajillion times before. FF no problems with this. Maybe it just happens to me.
fox has themes... fox has styles... fox has tabs... fox has everything... it doesn't take a genius to know that...