Vraylle

Because you always get attacked by cultists or assassins in the middle of the night if you stay at an inn.

Or maybe that’s just a Warhammer FRPG thing?

Prodigy is excellent.

Yes it is! I switched to it after seeing some questions about things TamperMonkey was doing, given that it is (or at least was at the time) closed source.

I’ll add ViolentMonkey (run arbitrary custom script on a site), and Stylus (add custom CSS to a site). These are great for adding extra features/utilities to a site you use a lot, adding dark mode to a website that doesn’t support it, etc.