I'm sure Firefox will release a Firefox plugin that will complement the basic service of identification. Imagine a plugin that lists all the websites you can authenticate with Persona. Or what if you had multiple personas, the firefox plugin can help you manage the selection of personas. Eventually, it'd become baked into Firefox, giving users that sense of it fundamentally "safer" than other browsers. Sure, this is all speculation, but it's a good marketing strategy on Mozilla's end and the start of gaining back the average consumer market share.

Hi, John, you have some cool ideas there! Hope to see you hacking on Persona. As a member of the team, I just want to clarify that this is not an effort to make firefox alone more secure; it's an effort to make the web more secure. Any browser vendor can implement the protocol, natively or in a plugin, and we hope other browsers will. Same for identity providers. The spec and code are all open-source: https://github.com/mozilla/browserid So Mozilla's strategy remains the same: Put the users of the internet first. That's why we made this.

It's great that Mozilla has made Persona open for everyone to develop with. While I still believe that Firefox has a lot to gain with Persona, I also agree with your vision that this is a good step towards a safer web (only time will tell if this takes off). I'll take it a step further and argue that if Firefox lead the charge with Persona tightly integrated, it'll make the web even SAFER for the average user, because it will force other browsers to tackle the issue of security as well, benefiting all users regardless of browser platform.