Enable Hardware Acceleration in Firefox & Get 1080p in Youtube’s HTML5 player

Youtube’s HTML5 player in Firefox limits the maximum video resolution to 720p. Other video resolutions including 144p, 240p and 480p are also not provided.

To enable all available video resolutions in Firefox open a new tab and go to:


Then search for;


Double click on;



In order to change their value to “true”.

Next while still in about:config, search for;



And change their values to “true” to enable Hardware Acceleration.

Finally close Firefox and open a terminal and enter;


Now if you open Firefox and check about:support you should see;



If you don't see this. Look here to enable it in Firefox settings: https://support.mozilla.org/en-US/kb/upg...celeration

And Youtube’s HTML5 player should show all available video resolutions.



If you would like to enable MSE & H.264.

Open about:config and search for;


And set;




to “true”.

And;


to “false”.



Now if you go to https://www.youtube.com/html5 MSE & H.264 will be enabled.



EDIT#

If Firefox becomes a bit "Crashy". Set:


To “false”.

This will disable hardware acceleration but will keep all the other changes.