Normally I don't need Session Manager at all as long as I press File>Exit on Firefox when I'm done. That will re-open yesterday's session. But if I close firefox improperly or it crashes, my session gets deleted and thus Session Manager comes to the rescue. Right now my FF crashed while watching a very long youtube video because it ran out of RAM, but upon restarting FF it changed the dialog box to some ugly Aero Vista crap and session manager popped up EVERY time saying the last session crashed. When I went to click restore session, it said 6000 tabs were open, most of them about:blank. Naturally, I went to load an older session with the normal 50 tabs open but every time I exit firefox, the same thing occurs. Somehow thousands of tabs of about:blank were open. And no, I don't SEE these tabs.

What is going on?