Why?

Here’s 101 things that the Mozilla browser can do that IE cannot. Issue One, at least for me, is reasonable control of popups and naughty scripting right out of the box. Issue Two is actual standards-compliant rendering of HTML (something Redmond would love to quash entirely). Internet Explorer can’t begin to deal with either issue, but Mozilla can — and so can Netscape, which is really just a version of Mozilla in corporate drag. Both are available for any platform IE runs on, and then some.

If you’re not happy with Mozilla/Netscape, which (admittedly) is/are a bit bloated at this point (including as they do a mail program; a news program; an HTML editor; a chat client; etc.), there are other, less-comprehensive, speedier options under the Mozilla project, including Camino (for OS X Macs) and Firebird (still beta, but available for lots of platforms). There are also plenty of other browsers outside the Mozilla family, including Apple’s very nice Safari (OS X only, which is a darn shame), Opera (for almost anything, but costs money), and others (I’m leaving out the whole Linux crowd entirely, but those folks can’t run IE anyway — besides, they have Galeon to play with). Don’t use IE just because you have it. Check out something else, if only to compare.