If I close Firefox v4.0.1 with a number of tabs open (around 8), then I start Firefox v4.0.1 running again it comes up with one window which has my original tabs loaded, but it also opens over a dozen other new Firefox windows each one of which is blank. I have to manually close down all of these windows. This happens every time Firefox restarts. Clicking on a "restart firefox" link does exactly the same thing as closing Firefox and then starting it again. I feel like I have been hit with one of those old spam web sites before pop up blockers became common. New empty fire fox windows opening all over the place.