Originally Posted by maceyr

The only way to stop Firefox from taking up all the CPU is to close it and open it back up. Doing some tweaking with the About:Config doesn't change much except that it takes a bit longer before Firefox gets to over 100,000k. This is definitely some kind of a memory leak where the more tabs you open, the worse it gets. Closing the program and re-opening it starts it back to a lower level.

I am now using a somewhat less bloated and functional browser that doesn't nearly get as big as Firefox. It's called OffByOne ( http://www.OffByOne.com )and for many people, they won't like it because there aren't many features and many plugins are not supported. But, for simple browsing, it's fine.

I actually love how much less CPU and memory it uses.