I'm having similar problems again in 1:91.9.1+build1-0ubuntu0.20.04.1 with Thunderbird's CPU usage well over 100% and long periods of not responding since the update.
But the fix for the original problem is still active: gfx.webrender.all = false gfx.webrender.force-disabled = true -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1959747 Title: [upstream] Very high CPU and slow responsiveness in Thunderbird 91 To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1959747/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
