Primarily mochitest-gl, but also others. You can get an idea of what uses it by seeing what is blocking updating our ancient version of Mesa.[1] We anticipate that this update should improve the reliability of our tests.<p>I don&#x27;t think there are specific results that are useful to anyone but us, other than that Mesa is viable for these sorts of things. We don&#x27;t have a centralized tracking list for Mesa issues.<p>Like usual, if you try running WebGL on Mesa and run into unfixed issues, file a bug and we&#x27;ll fix it.<p>[1]: <a href="https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1220658" rel="nofollow">https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1220658</a>