Hi all. I've just been updated to Version 84.0.498.0.
As far as I can see so far, the issue I previously reported with editing a PDF causing the browser to crash has been resolved. Still no return of Tab Groups though.
Will post more changes as I discover them.
@Pete_FFC I miss Tab Groups too, sticking a copy of released version 81 to still use it, and looking at each new Canary build with hope.