I love and hate this browser. They offer lots of handy add ons you don't get anywhere, but if you use for example FireFox 4 or 5 (no difference) for quite a while and leave lots of opened pages because you need them for an enquiry, FireFox becomes very fast unusable and horrible slow. So I gone back to Safari. Everything is better than bis bullshit. Sorry, but I'm ask myself what are they doing? Every version is becoming faster and faster so they say, but in reality they are unusable for power users. I'm not on a slow Mac. My iMac 27" has 12GB RAM and a 3,06GHz Intel Core CPU and of course the HD isn't too full. So this browser is a really worse choice.