On November 30th, 2016, Mozilla shut down the persona.org services. Persona.org and related domains will soon be taken offline.
For more information, see this guide to migrating your site away from Persona:
https://wiki.mozilla.org/Identity/Persona_Shutdown_Guidelines_for_Reliers
Persona currently requires JavaScript. If you need to support users who don't have JavaScript enabled, you'll have to implement an alternative login scheme for these users, and disable the "Sign in with Persona" button, enabling it in the JavaScript code that connects the sign-in button to navigator.id.request()