Originally Posted by
planemechanic
It may not be Firefox. Maybe you have something else infecting your machine. I had a similar problem and reinstalled windows and everything else with a clean slate. The problem went away.
I frequently have as many as 30-40 tabs open at any one time and almost never see my RAM usage above 40% and my CPU usage is about the same or much lower.
It's happening on both my laptop and my desktop...
I've taken the advice of earlier posters and started fresh with my extensions...and add some additional ad/script/flash related ones