[alefteris]

Regarding Firebase, they said that they "added support for Persona as one of the authentication mechanisms for their Simple Login service". Their main website must not be using this service or not enabled the particular authentication component?

[anant]

That's correct, the Simple Login service allows apps that use Firebase to integrate Persona authentication: https://www.firebase.com/docs/security/simple-login-persona....

This means the data you store in Firebase can be associated with a Persona user, and you can structure your security rules to enforce whatever read/write behavior makes sense for your app.