Half of you said something like, "I have firefox cause it's better."
You offer no reason, nor no proof of why you think this. Some of you said you like firefox and offered a reason, but no proof. So all of your opinions should more or less be ignored. If your going to make an argument, make a statement, support it with facts, and relate the facts to your argument. What do I use personally? I use FireFox.
I use FireFox because I like the layout of the tabbed browsing more. I also enjoy the extensions it offers, and the themes. Several themes can be found on
www.FireFox.com, along with extensions. If you have IE7 though, it's not worth the transition. Ironically, FireFox runs on more versions of Windows then does IE7 (Source: Firefox and IE7's respective websites) . However, one very nice feature that IE7 has is that the tabs, can be reordered, can also be previewed on a page with clickable thumbnail displays of each open tab. IE7 also has beefier RSS Feed options (Source: gizmodo.com).
Both are even in security more or less, and the only way you'll encounter a problem in either of them is if your doing something stupid like downloading illegaly cracked software (Source: cnet.com). If you have IE7 and are used to it, their is no noticeable difference in anything in firefox. For a brakedown comparison, as well as the results of reviews from multiple respected websites, see
http://gizmodo.com/gadgets/feature/frankenfight-ie7-vs-firefox-2-209938.php.