FireFox was working, shutdown system for the night. Next morning it would not open. The browser frame opens up and the tab at the top has the little 'busy' circle looking like it is trying to do something, but it never opens. The frame will have several images of other widows dragged across it. Pulldown from the tool bar open and act like they are operational. I did an install (Update) and at the end of the installation it asks if you want to open FireFox. That one works. If I close out of the browser it will not reopen.