I open up Firefox wanted to do something before I started may work from the previous session the window crashed for some reason. So I was not able to restore my real previous session which I had 2 windows open with about 6 or so tabs in each although from the history, I can find some of these windows/tabs not all of them, others where gone as I couldn't remember all of them. It would be good if you could add a feature that you can go back 2 previous session not just the last one.
