Recently I have noticed a slight problem with my Firefox browser. Upon closing when I attempt to re open (shortcut: ctrl + alt + f), it just sits there. It doesn't even appear to be registering that its trying to open. If I try to open again it does nothing & will only fully open & show the running Firefox windows when I open Task Manager. It doesn't happen all the time although its been an off & on occurrence over the past few days now. Is this happening because of the shortcut key? Or is there another problem why it wont start until Task Manager is opened?