Whenever I go fullscreen in html5 things it puts a message at the top saying you're now in fullscreen, the problem is that this message totally stops you being able to do anything else until it disapears. So if I open a youtube video in fullscreen I can't pause it or do anything until I wait for the message to disapear. How can I disable the message totally?
Disable Firefox Fullscreen Warning with HTML5 Content
firefoxfullscreenhtml5
Best Answer
This is the security feature, but yes it's annoying if you're on trusted site and the message popups every time you enter full screen.
Solution: enter about:config in address-bar, and search for full-screen-api.approval-required and set it to false
You're done!