Personally, I've been using Netscape / Firefox for years, and am very satisfied with it. I especially like its tabbed browsing arrangement, and it appears to be the ONLY tabbed browser which, when you open a link in a new tab, will allow you to go directly TO that tab! IE's tabbed browser won't let you do that, and the one time I tried Chrome, it wouldn't either, which strikes me as being rather odd.
I will admit that Firefox has been a touch buggy here and there, but nothing so serious that I would consider dropping it. As for IE, I agree - it's the best browser for downloading the browser of YOUR choice! Other than that, I wouldn't hit a dead dog with it.