I mainly switched from IE due to how slow it is compared to most web browsers and because it the most vulnerable to security threats. I use Firefox as my main browser but have been trying out Safari lately. I love Safari's interface but it seems slower than Firefox and I had trouble with log-ins. My computer has been acting weird today so if Safari turns out just as fast or faster I'll switch to it. The only add-ons I use with Firefox are AVG Linkscanner and KeyScrambler so not a big deal I guess.