Yes, you read that correct. I've used it for a long time now and I love and praise it for its user-friendly-ness and simplicity while still holding onto a nice lay-out. Firefox is still the most user friendly browser, but for some reason I like Safari better, and IE is not even an option to start talking about.
You should try Google Chrome (Even if it thinks Google is a misspelt word LOL) it's super quick and it's got all the important add-ons now like Adblock.
I'm not going to create a lengthy discussion here. But the ad-block add-on only hides the adds but doesn't stop you downloading them. So it still slows down browsing a little. Still a better solution than Safari though, it just doesn't work as well as the Firefox extension.
There are custom config files for Crysis that you can use, they give you the look of ultra high but with a smaller performance hit.
http://www.gamecritics.com/the-noobs-guide-to-optimizing-crysis