I know that Firefox has pretty much been a memory hog for years now, and ever since I can remember using it. But I have never seen it get this bad since 4.0 was released. I am getting 1Gb of RAM routinely within half an hour of opening the browser, topping at times at 1.5Gb at times. I simply do not understand why Firefox needs to use that much memory. It's not like I'm having 20 tabs open, with half of them being flash videos either. Even when I had tons of tabs and heavy sites open on previous FF versions I never once saw it go over 1GB of RAM. This is frankly unacceptable. Is anyone else noticing ridiculous RAM usage since 4.0?