[StavrosK]

Well, as both a developer and a user, I hope that Persona catches on. I certainly use it on all my new sites, and preach it whenever I can.

It's definitely still early. Hopefully it will spread quickly.

EDIT: Where's the Firebase signup? I only see a Github and a plain one.

[callahad]

Firebase added Persona support to their API for apps built on Firebase. It's not (yet) supported on their home page.