This add-on works, but the main GUI lags, and is not practical :
you have to search twice for an entry and copy-paste separately the username and password, when you cannot enter the URLs for it to be filled automatically.

The UI lags terribly. The in-field PMP icon allowing to choose the right password ressource seems to have been fixed and responds properly however.

This is pretty unpractical, while there are no Windows or Win10 UWP application for this password manager. I really would have prefered another password manager just because of the frustration generated by this add-on.