I'm a big fan of multi-account containers.. or at least, was. Recently I inadvertantly added a domain to one of the ascribed containers on my laptop and I'll be damned if I can work out how to undo it, other than uninstalling and starting over, which'll be a pain, because I've customised it quite a bit.
...This is a plea for help, by the way, in case it wasn't obvious :) I'm sure there must be a json file or something, somewhere, I can just edit.