Зашёл на phoronix, а там статья
https://www.phoronix.com/scan.php?page=news_item&px=Firefox-80-VA-API-X11
Прошёл по ссылочке на баг 1619523 (ох ты багов наклепали!) а там и вправду:
Martin Stránský [:stransky] (back on Jul 20) Assignee Comment 29 • 23 hours ago So this is done now. Run Firefox with EGL on X11 (set MOZ_X11_EGL=1 env variable) and you get VA-API as well as on Wayland. Status: NEW → RESOLVED Closed: 23 hours ago Resolution: --- → FIXED
[..]
Cristina Coroiu [:ccoroiu] Comment 41 • 14 hours ago bugherder https://hg.mozilla.org/mozilla-central/rev/2b880e8d9143 Status: REOPENED → RESOLVED Closed: 23 hours ago → 14 hours ago status-firefox80: affected → fixed Resolution: --- → FIXED Target Milestone: --- → mozilla80
