My computer died about three days ago, and firefox had three windows open. When I rebooted the computer again, firefox automatically started up, and the flyout panel thing that shows up when you right click on an app claimed that all three windows returned. However, only two of them were actually accessible, and clicking on the app to move between them and the F3 window confirmed this. Clicking on the third window accomplishes nothing, reveals nothing, and just moves the little checkmark around in that flyout panel. Closing the other two windows before restarting firefox does not open a new window because it thinks one is already there, but I cannot in any way see or access it outside of its label in the flyout panel. Even hitting "Show All Windows" just shows the window I am typing this in. What am I supposed to do here?