great tip!

it indeed works in XP but has not effect in Vista. nice tweak

thanks for the tip..it helped a lot..

While this worked very well for me on an XP with Firefox 2.0, it does not make much difference in Vista with Firefox 3.0 (RC1). I think it has more to do with Vista than Firefox 3.0 - most likely Vista took the memory management away from Firefox.

Thanks for that tip! That's awesome. I've had some real issues with memory leaks or whatever with Firefox &/or its extensions. One thing about this fix, though, is that although the memory usage initially goes down below 6 meg when minimized, it slowly but steadily rises up again to near where it was before being minimized. Rather weirdly, when I maximized the window again it actually went down a bit. In any event it remains lower than where it started even after re-maximizing it. Firefox ought to ship it with that configuration. BTW, I typed in the wrong name for that Boolean the first time I tried it, using periods rather than underlines: "config.trim.on.minimize" rather than "config.trim_on_minimize" and now both lines are in that config file and I can't see a way to delete it. Anyone know how I should do so?