I've used IE, FF, Opera, Google Chrome, Safari, Seamonkey and a few other browsers. FF 4.0 Beta 3 is my default browser. I can't speak for others, but I don't look down on IE users, or any other browser or OS user. I converted to FF last summer, when my main OS was XP Pro. In the spring of 2009, I was "invited" to improve IE by upgrading to IE8 from IE7. I had no problems with IE7 at all, and I installed IE8 onto an OS that the browser wasn't even built for.
Windows 7 was on it's way, and the robbed Vista users deserved a better browser than they had. No way was MS going to release Windows 7 with IE7 as it's default browser. It looks good on Vista & Windows 7, but on XP, there were many problems with pages not rendering properly, it was slower than IE7 too. The reason that I couldn't simply uninstall IE8 from XP was that I had SP2 at the time of install, then a week or so later, SP3 was delivered via automatic updates. At the time, I was not backing up, due to not educating myself on it, and the only alternative was a reinstall, which I didn't want to do.
FF 3.5 RC was available at the time of my conversion (late spring 2009), I installed it, and my notebook ran faster than ever. And I was able to make my FF the way that I wanted it to be. A refreshing change from IE for me.
The only ones (that I see) that fits into the snobbery and looking down on other users are Apple Mac consumers. I know a few Mac users, and they fit that description perfectly. Their sales force are no different, they openly look down on Windows products as though it were garbage, an "inferior" OS, and the computers it runs on. In one of those Apple "kiosk's", a couple of years ago, I actually was considering buying one, and had the cash to do so, but after the salesman made those comments, I was turned off on the thought of being a Mac user. I just didn't feel comfortable with his presentation. Instead of spending his time explaining the benefits of being a Mac user, he turned it into a Microsoft bashing speech, which forever left a bad taste in my mouth in regards towards Apple.
Cat