0xC0DED0D0 Updated, and it works now.👍
But then I did this tap out of curiosity https://ibb.co/cSK76kFc
which instantly 'bricked' Torbrowser. Reboot didn't help.
Any attempted start displayed a Torbrowser coloured window, frozen, no network activity. I can't think of any supported means of rescuing the bookmarks from this state.
I had backups of these myself, but be adviced: I ended up clearing my Torbrowser user data to fix this. If I had no backup for bookmarks, they'd be gone.
So, do not enable that "Debug Drawer" if you can't reset your Torbrowser install!