Yeah, but I hate tabbed browsing. I don't know why, it just never caught on with me. I have the instinct to go to the bottom of the screen to change tasks, and in my mind, a different open web page is a different task, even if it's just two threads on FR. It works for me.
768MB, btw.
With an extension called Tabbrowser Extensions, you can specify that the tabs be located at the bottom of the screen. Just a thought.