Doesn't work
Meaning "Variable refresh rates" for smoother video performance. Had to look it up.
Ubuntu hasn't used unity for years and years. It's gnome with some extensions now.
There is an extension to move apps to a given workspace, but a static one. Not the "last used".
Reminds me of this great bit https://www.youtube.com/watch?v=hx_f6QdlW2U