If you have Firefox 4.0, do you like it? Is it a RAM hog? Is it faster or slower? Does it Crash?

Every new version of Firefox disappoints me because the RAM situation gets more and more out of control. Firefox is now asking all users to upgrade to 4.0. Should I?

Does your Task Manager ever routinely tell you that Firefox (along with plugincontainer.exe, which is basically still Firefox) is using more than 400,000K?

Should I keep my Firefox 3.0 (having regretting even going forward from 2.5) ?

I originally went to Firefox for speed, but in the last 3 years, its value seems to be the plugins, but not speed at all. Have you noticed the same thing?

I use Windows XP, if that’s relevant.