Videos freeze in fullscreen mode in Chrome and Firefox

Solution 1:

I had the same issue, people have found this thread helpful. However it didn't work for me, so I troubleshooted for a bit, and figured that it must be some clash between the kernel handling my discrete video card(Nvidia GeForce 630m) , which however seems to be fixed by installing and running tlp. Added bonus, more battery life :) :)

Solution 2:

Disable HW acceleration in Firefox and Chrome/Chromium. Today's Google-Chrome update fixed the issue for me but before that, disabling the hardware acceleration was what fixed the problem.

Solution 3:

Type about:config in FireFox address bar, accept the risk warning. in the about:config search bar type:

media.hardware-video-decoding.force-enabled;              

Set it to true

Also change:

media.hardware-video-decoding.failed;                        

Set it to false