[Discuss] firefox 4 is a memory hog

[me at mattgillen.net (Matthew Gillen)]

I've noticed lately that when I unlock my gnome3 session after being
gone for a while (several hours), it takes forever to get me back to a
useable desktop.  I initially was blaming gnome-shell, but it appears
the problem is actually firefox forcing the whole system into swap.

Firefox was using 60% of memory.  Killing it and reloading the same set
of tabs makes it use 6.3% of memory (as reported by 'top').  I don't
think it's a particular web page that is going screwy, because it
happens at work and at home, and my set of tabs are completely different
(okay, fine, I use google.com in both environments...)

Is anyone else seeing this kind of runaway memory usage?

Matt