Recent answers to Webrender causes Youtube videos to be laggyhttps://support.mozilla.org/en-US/questions/12620912019-06-16T21:45:57-07:00Try to set this pref to false on the about:config page.
gfx.webrender.picture-caching = false
Clos2019-06-16T21:45:57-07:00cor-elhttps://support.mozilla.org/en-US/questions/1262091#answer-1230913<p>Try to set this pref to false on the <b>about:config</b> page.
</p>
<ul><li>gfx.webrender.picture-caching = false
</li></ul>
<p>Close and restart Firefox after modifying the setting for changes to take effect
If this didn't help then modify this pref as well.
</p>
<ul><li>gfx.webrender.force-disabled = true
</li></ul>
<p>You can open the <b>about:config</b> page via the location/address bar.
You can accept the warning and click "I accept the risk!" to continue.
</p>
<ul><li><a href="http://kb.mozillazine.org/about:config" rel="nofollow">http://kb.mozillazine.org/about:config</a>
</li></ul>Honestly, I haven't seen such an issue in this version.
https://github.com/servo/webrender/issues?u2019-06-15T00:40:36-07:00TyDraniuhttps://support.mozilla.org/en-US/questions/1262091#answer-1230602<p>Honestly, I haven't seen such an issue in this version.
</p><p><a href="https://github.com/servo/webrender/issues?utf8=%E2%9C%93&amp;q=is%3Aissue+youtube" rel="nofollow">https://github.com/servo/webrender/issues?utf8=%E2%9C%93&amp;q=is%3Aissue+youtube</a>
</p><p>You can create a new issue on github.
</p>