I have been accepted to participate in the beta version, and I gotta say this works very well.
There are some minor details that could be improved, but really nothing that ruins the experience. Really great product. Also check out their other services; You will not be dissapointed.

Magnus
Denmark

Excellent add-on and it works as intended, also works on mobile as well. Loving it so far, keep up the great work Proton.

Beautifull, Fast, good feature, so far so good...