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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?

Levi H
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3 Answers3

43

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!

Shah Zor
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UPDATE: OCT-2019 to cover Firefox Quantum:

Enter about:config in Firefox address-bar and search for the keyword "full-screen". Identify following listing and change their respective values as mentioned against them below:

full-screen-api.transition-duration.enter - 0 0
full-screen-api.transition-duration.leave - 0 0
full-screen-api.transition.timeout - 0
full-screen-api.warning.delay - 0
full-screen-api.warning.timeout - 0

(Archival Notes) FireFox 42

Option "full-screen-api.approval-required", no longer hides the Website is Now Full Screen warning. In previous versions setting it to "false" could resolve the problem. They are putting a new option in i.e. (full-screen-api.warning.timeout "0") that will do the same thing, but it will be rolled out in FireFox 43.

You can change the fade in/out animation when going full-screen by setting:

full-screen-api.transition-duration.enter 0 0

full-screen-api.transition-duration.leave 0 0

Note/Warning - Defaults are 200 200 and 0 0 will remove them completely.

Keep in mind these are put in because they are a security features to help stop Phishing Attacks. So either wait till Firefox should enable "full-screen-api.warning.timeout" option in next few releases OR use above at your own risk...

Community
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Amit Verma
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  • More information > [support.mozilla.org](https://support.mozilla.org/en-US/questions/1085113) – tahwos Nov 28 '15 at 17:32
  • Another link > [support.mozilla.org](https://support.mozilla.org/en-US/questions/1092553) – tahwos Nov 28 '15 at 17:34
  • Creating a userChrome.css file, was the only method that worked for me - all others failed. – tahwos Nov 28 '15 at 17:49
  • Didn't work for me – Slava Dec 02 '15 at 09:30
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    I'm getting tired to track these kind of config changes… they happen more and more often. – Gras Double Dec 13 '15 at 11:32
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    Firefox 43 is Out and setting "full-screen-api.warning.timeout" to 0 (ZERO) is working well.. Try it out!!! – Amit Verma Dec 16 '15 at 19:03
  • Thanks for this, the answer above should reflect this change too, since it's basically useless now. – SomeNickName Dec 18 '15 at 13:17
  • Doesn't work, both `full-screen-api.transition-duration.enter` and `full-screen-api.transition-duration.leave` are set to `0 0`. `full-screen-api.warning.timeout` to `0` does work in Firefox 55. – user198350 Aug 22 '17 at 08:18
  • Here in 2019, I think the functionality has changed. I still see the notification, and under certain conditions, it stays on top of the video full screen, which is distracting. – YetAnotherRandomUser Oct 07 '19 at 12:50
  • @YetAnotherRandomUser, I've made changes to my answer to reflect with Firefox Quantum. Hope it helps.. – Amit Verma Oct 08 '19 at 13:41
1

Since Firefox 43 (still working in 59)

1) enter about:config in address-bar
2) set full-screen-api.warning.timeout to 0

janot
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