Persona’s technical implementation required permitting use of third-party cookies across domains (yoursite.com vs persona.com), which turns out to be wholly inc

Persona’s technical implementation required permitting use of third-party cookies across domains (yoursite.com vs persona.com), which turns out to be wholly incompatible with tracking protection efforts. From a technical standpoint maybe it’s possible it could have been fixed, but it turned out that no one particularly needed a third-party “middleman” authentication service that required webmaster effort per-site—especially with OAuth2 already providing a viable, if imperfect, alternative approach.