Can you try installing libavcodec58 ? sudo apt install libavcodec58
Does it fix the problem? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906146 Title: Firefox does not auto-play Twitter videos in 20.10 Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1906146/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs