MockMyID was a Mozilla Persona Identity Provider (IdP) that gladly issued identity certificates to anyone and everyone, without a second thought.
It was like Mailinator, for Persona.
(All email sent to mockmyid.com addresses was delivered and readable at mailinator.com!)
MockMyID made it easy to test and demo sites that used Persona.
Whenever you were asked to log in with Persona, you could make up any email address you want @mockmyid.com.
This is a completely static site; the public_html/ directory is the document root.
Requests for /.well-known/browserid should include a Content-Type: application/json response header.