Fastest where it really matters, in browsing speed (page rendering, back/forward). But again, that is subjective. On my system, opera runs faster when it comes to rendering pages, browser response, control response, and its overall lighter as well. But like I said, this is subjective. I am not out to start a war on which browser is better. On every system I've used, opera responds and handles better than other browsers. Please, dont turn this into a "Which browser is better" thread. I merely stated my opinion and am not intending on defending my position as I feel it has been done numerous times in the past on various other forums.
People will use what they prefer, and I know that I would prefer to use opera, however, I cant because roboform is not supported which was the main point of my post. Not to start another browser war.