I use Chromium myself. It's got tons of add-ons like firefox and is fast as hell. Plus one little thing about it crashing doesn't cause the browser to crash.
I don't care all that much about security since I'm running a Linux OS but apparently because of the way Chrome is set up it protects the OS pretty well.
I've been using chrome for awhile....Ever since I moved to my apt firefox was slow as hell.Dunno if it's because they updated it and none of my ad ons were compatible or what...idk.Only addon I have for chrome is a dark blue halo odst theme and a weather thingy and WOT,and adblock