I've been out of the loop with Chrome and Opera for awhile now, how are they doing on addons/extensions? I still personally use Firefox, solely because of the multitude of addons it maintains, (NoScript, Smarterfox, Firebug, WOT, Stumpleupon to name a few) most of which I couldn't live without. As for security, when you factor in NoScript and WoT for Firefox, how does it compare to Opera and Chrome? Also, last time I checked, Chrome was indeed faster (Loading web pages, executing Java code) than Firefox, not sure about Opera. And if I remember correctly Chrome runs separate instances for tabs