When I go full screen on videos they dim right away, this issue only happens with FireFox and not Safari or any other browser.
As I said, I use a 4K Colour TV (all correctly setup and running) as a monitor and most times all is fine but occasionally when I switch on my desktop, Firefox shows a s… (read more)
As I said, I use a 4K Colour TV (all correctly setup and running) as a monitor and most times all is fine but occasionally when I switch on my desktop, Firefox shows a small 2K display so I have to double click the title bar to change the display back to 4K. I also use, concurrently, Opera (for it's free inbuilt VPN) and it sometimes does the same thing. This also occurs with Skype AND uTorrent at various times. Because it is so common I suspect my Windows 10 64bit Pro must be sending some sort of signal to cause this behavior? All in all Firefox does this less than the other three Apps :)
