My workaround:
Set media.ffmpeg.vaapi.enabled to FALSE OR Set media.rdd-process.enable to FALSE While still having media.ffmpeg.vaapi.enabled set to TRUE -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1964547 Title: [apt] Firefox 98 installed from apt cannot Play YouTube Status in firefox package in Ubuntu: Incomplete Bug description: • Ubuntu 21.10 (64 bit) • Firefox 98 installed via apt (cookies & cache have been cleared) • Kernel 5.13.0-30-generic x86_64 • Tried on both wayland and X11 session → same result Steps to reproduce: (1) Visit https://www.youtube.com (2) Choose one of the video Actual Result: Video doesn't play What Expected: Video Play normally Previously it was normal on Firefox 97 (apt version) Tried installing Firefox 98 Snap version and it works normally To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1964547/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp