I have got Firefox open last 15hours, ram useage not even increased. I donm't know what crap pcs you got. I'm using a normal laptop from my school :O Also everybody bashing Firefox 4 is just Google asskissers.
1. It's Great and fast.
2. It's Simple, and nice theme.
3. If u are infected by keylogger, and it will send all ur pw and id to the logs.. it wont happend if u use firefox 4 cause its so new!!
4. Very easy to use..