Current situation: I start Firefox and it starts maximized. When I move the mouse cursor to the lower edge of the screen, the taskbar should unhide but it remains hidden. To correct for this by dragging the window so it resizes (floating window) and then maximaze by pressing the maximize button on top right. Now the task bar unhides as expected. If I drag the window so it resizes (floating window) and then maximaze by dragging it to the top edge of screen, then the taskbar again wont unhide. I must do this every time I open a new Firefox window. I can replicate this whenever I want.