this randomly happens. sometimes, when i click the red x button in the corner, the window will close like any normal window would. however, sometimes when i click it, the button seems to "spaz out", and will start blinking crazily, but won't close the window. the same is with the minimize button. it too will start to blink (by blink, i mean it turns the color it would when you mouse over it, then goes back to normal, then blinks again, etc). i end up having 5 or 6 different firefox windows open because i can't close them. then when i go to the task manager, and try to close them that way, and click "end task" for one of the windows, it closes ALL of the firefox windows. once i restart firefox(or my computer), it seems to be normal again, but then after a while does the same exact thing. there is no crash message or anything. when i restart firefox again afterwards, all it does is reopen all of my windows/tabs. so if 5 windows closed, all 5 will restart with the tabs.