I have a couple of email addresses for my persona account which I share between various sites. But whenever I want to log into a site which I haven't used for a long time, I'm always confused which email address to use.
It would be great if the popup would not show all available email addresses but only the one which I have used to login, and an input field where I can specify another one if necessary. But most of the times an user will only have a single address assigned.
Transferring from mozilla/browserid#2793
Thanks @whimboo