This appears to be a combination of multiple issues: * Firefox doesn't support hardware video decoding.
* Your CPU doesn't support hardware video decoding. * Firefox is software-rendered. So I don't think the high CPU of Xorg or any other related process is unexpected or a bug. Except maybe in your final statement: > When I close firefox xorg ix in excution in the same way. Can you please explain what that means? ** Summary changed: - Bug xorg + High CPU usage of the Xorg process ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1826786 Title: High CPU usage of the Xorg process To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1826786/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs