>> Both OpenID and oAuth allow your identity provider (be it Google, Facebook, Twitter) to track every website you sign in to.

  > So does mozilla persona as your identity provider is your browser !

By no means does this need to be the case. All the source is available, and you're free to set up your own identity provider if you wish.

https://developer.mozilla.org/en-US/docs/Persona/Implementin...