It works. But there is very limited control on extension behaviour and the only sign in option that works with the extension is username + password. If you use a linked account to sign in there will be a signin popup, but the extension ultimately does not recognize it. There is limited interface for feedback too.

This extension is so needed! Thank you thank you thank you devs!!!! Free Falastin!

Early days I think. I really hope it gets better as it's so cute and a good thing. but seems like the data needs to be populated first. I put in some really obvious things which should have been flagged but were okay (you can submit a form to indicate that the results weren't right). Great this is in the works but perhaps for now rely on your own boycott guides.