So, how to do we revive Persona? I mean, it's still around, but it's been kind of back-burnered by Mozilla.
The odd thing is that I didn't even know it existed until this whole conversation about Google dropping OpenID came up...and I use Firefox as my browser across all my devices, I use sync, I use Thunderbird, I follow the Firefox OS development with interest, and yet, I had no idea Persona was a thing.
I've always been uncomfortable with Google and Facebook being my "identity" provider, and I've been equally uncomfortable with the fact that they would happily provide those authentication services but won't accept them (i.e. I can login to thousands of services using my Google or Facebook account, but I can't login to Google or Facebook with any other service account). I simply don't like Google and Facebook owning my online life, but the convenience of it often trumps the ethical and privacy implications. I have, thus far, avoided integrating Google or Facebook logins on my sites because of the ethical implications, but I hate making my users keep up with passwords and usernames.
Why aren't more websites supporting Persona?
For my part, I plan to integrate Persona into the next version of my company website launching early this year, as well as our wiki and blogs. I may even try to figure out how to fit it into our products, somehow.
I found the following, seemingly maintained, extensions for Persona support in the apps I use for the websites I maintain:
https://www.drupal.org/project/persona
https://wordpress.org/plugins/browserid/
https://www.mediawiki.org/wiki/Extension:Persona