Mozilla has released Firefox 84. It brings WebRender to more systems including some Linux computers, it's the last version to support Adobe Flash and it now supports Apple Silicon CPUs natively.
Canonical has made the decision to revert back to the Xorg display server in Ubuntu 18.04 LTS, citing stability concerns. The company plans to continue testing and working on Wayland to improve it.
Canonical's Didier Roche has confirmed that the Wayland display server will become the default, replacing Xorg, in Ubuntu 17.10 due for release in October. Xorg will still be installed too.