To correct myself: according to https://bugzilla.mozilla.org/show_bug.cgi?id=1639531#c14 at least H264 video should now work even without installing those packages, but you do get better performance with them installed, as ffmpeg is more optimized than OpenH264.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1983010 Title: Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index2/size To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1983010/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
