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how to fix the blacksceen when go into fullsceen

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so i was on youtube watch video and when i try go into full screen the screen is black for few's secs the picture and audio was play there when the screen is black and i try everthing to fix the Problem .This stare happen when firefox update the other day which this never happen before when firefox update and i like to know how to fix the Problem and i try test the youtube on Microsoft edge and there no Problem there so i hope someone can help me fix the Problem i try play around on the add-on but nothing is work and everthing is up i even try uninstall firefox but that did not work

so i was on youtube watch video and when i try go into full screen the screen is black for few's secs the picture and audio was play there when the screen is black and i try everthing to fix the Problem .This stare happen when firefox update the other day which this never happen before when firefox update and i like to know how to fix the Problem and i try test the youtube on Microsoft edge and there no Problem there so i hope someone can help me fix the Problem i try play around on the add-on but nothing is work and everthing is up i even try uninstall firefox but that did not work

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Is this problem on a Windows 10 system? Your browser identified itself as Firefox 42 on Windows 8, but you mentioned Microsoft Edge, so... I'm just a little confused.

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i use window 10 right now how to i fix the Problem on firefox with the there no Problem when i use Microsoft edge i work find i test it . how do i fix the is it my computer or is it firefox so full screen the screen is black for few's secs the picture and audio was play there when the screen is black

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Try to modify these prefs on the about:config page.

  • full-screen-api.transition-duration.enter: "0 0"
  • full-screen-api.transition-duration.leave: "0 0"

Leave out the quotes around the value (enter only two zeros separated by a space).

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.


You can try to disable hardware acceleration in Firefox.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.