Windows 10 hiding taskbar not working when Firefox is "over" the taskbar.
Whenever Firefox is over the taskbar or maximized, with the "Automatically hide the taskbar in desktop mode" option enabled on Windows 10; the taskbar doesn't 'unhide' whenever you hover over it.
This screenshot shows Firefox maximized with the 'taskbar' (the 1px high white bar): https://i.imgur.com/Ys63fGN.png This recording shows Firefox not allowing the taskbar to 'unhide' when it's over it: https://i.imgur.com/G4Vy3r5.gif
I should also add that I am using Firefox Nightly, this does not seem to be happening on the stable release of Firefox.