For the past two days, my Firefox has been acting up. I open Firefox, and when I'm done I close the browser. But then if I try to open it again it won't. I go to the Task Manager and go to processes and try to end "firefox.exe" but it doesn't end. Restarting the computer doesn't fix the problem either. The only way I got it to work was restoring my computer to an earlier date, but it happened again and I had to do the System Restore again. Anyone know why it's messing up?