Laggy Youtube performance

Question

Youtube works fine in Windows, but in Ubuntu GNOME 15.10 video is very not smooth. Framerate drops, the lag is very visible when things move on the screen.

• both Firefox and Chromium have this issue, although the latter is slightly better;
• Ubuntu GNOME 16.04 booted from a USB stick acted the same way;
• I have an AMD video card;
• I tried both the open and fglrx drivers;
• I have "Resticted extras" installed;
• Youtube itself says my browser supports everything;
• Vlc plays these vids very nice and smoothly.

Solution

To fix this I went to Firefox about:config menu and set layers.acceleration.force-enabled to true.

Comments

[xangua]

Are you using the flash plugin or html5 player?

[Ivan]

As far as I can understand, it's HTML5.

[Trevor]

It's weird, I got the problem in a way that there is wave in youtube video when the scence is fast (like action), I change the value you metion to false and it's better.