We all know those web pages where the only alternative to a site-specific login is a social networking account. That's not very reassuring for anyone skittish about linking their commentary to a Facebook account relatives might see, if they're even willing to join a social network in the first place. Mozilla has been aware of that hesitation long enough to have just released its long-in-development Persona sign-in service as a beta. Although it has the same kind of simple approach
