Comment 26 for bug 1964547

Can confirm this on Manjaro Linux: I believe I was updated to Firefox 98 yesterday, ever since I'm unable to play video on any website, sometimes it works briefly but playback lags and stops to the point where it's unplayable. The issue goes away after disabling "media.ffmpeg.vaapi.enabled" in "about:config", might try disabling the sandbox feature as a workaround to keep video acceleration.