It's not working. I've even tried registering on their website and I haven't received the activation email.
It's infuriating.

The add-on works, but I don't see any reason for it to have permission to our amazon data besides selling it. Which I don't disclosed anywhere.

Thankfully you can remove those permissions, and they are clearly shown.

Хорошая задумка, посмотрим

OMG, I don't know if this is an official extension, but it works without any issue, this just makes Language Reactor better than Migaku!!! Thank you very much to the dev!!!

Works good.

Fantastic tool for language learning.

Até agora tem funcionado bem, gostei!