Comment To anyone who can replicate Firefox memory issues: (Score 1) 375
Does this resolve your problem:
1. Type about:config in the address bar of Firefox 4
2. Scroll down to
image.mem.min_discard_timeout_ms
3. Simply change the default value from 120000 to 10000
http://www.overclockers.com/forums/showthread.php?p=6882338
