BrowserID widget does not work & displays no error if JavaScript is disabled

Persona/BrowserID doesn't really offer a widget, because all that's needed is for webapps to call "navigator.id.request()" or "navigator.id.get()" when the login button / link is clicked. So all that's provided are sample buttons that people can use:

  https://developer.mozilla.org/en-US/docs/persona/branding

To solve this bug, perhaps what's needed is:

1. marking the button as disabled in the HTML (ideally it would be grayed-out too)
2. when the page is done loading, mark the button as enabled

That way, users with Javascript disabled won't try to use that button.

Ugh. "you can't log in at all without JavaScript" is absolutely not going to be a viable solution for us (or many other targets of BrowserID, I suspect).

We'll have to see what we can do to get around this. I don't want to just drop BrowserID, but it's clear that it won't be feasible to leave it as our primary login for the early releases like I hoped.

I've put in a <noscript> warning message for now, but I'm not sure if it's going to be sufficiently noticeable. I'm going to close but am happy to re-open if user testing indicates we need something better.