IE7 Wants.
Recently Microsoft announced IE7, rightfully so as FireFox is certainly gained a loyal following. On AnandTech 38% of all browsers are Gecko based, while 36% are IE. I'm still an IE user, have been since IE4. FireFox is a decent browser, I just prefer IE for some unknown reason. I've been doing a fair bit of JavaScript work lately, and admittedly I've been using FireFox to do all of my debugging. FireFox has a wonderful JavaScript console built in, that details the location of the error, including file name for multiple JS files. It is far and away better than the JS errors IE gives you, "there was an error on line 4 (usually the wrong line number)". FireFox also does not spawn alerts on JS errors within a page by default, you have to use the Console to view those (the way it should be IMHO).
IE Team, if you are listening please put this functionality in IE, while you're at it give us tabbed browsing :)