Mozilla Persona causes "some error" when returning focus

[Alexa Cain]

If I try to sign in using the BrowserID option but instead close the window, when focus returns to the Mailman page a popover window indicates that "Some error occurred"

Steps:

On the Lists page, select a list.
Select "Log In" under Membership
Select "SignIn" under Login using BrowserID
After Mozilla Persona loads, exit the window manually instead of following steps to login/create account

I am using Firefox on a Windows XP machine.

[Terri (terriko)]

I suspect this may be a Mozilla Persona issue that we can do nothing about (except maybe report the bug to them?), but I'd like it if someone could verify it and see if there's any way we can provide a more friendly error message on our end.

[Terri (terriko)]

This was caused by some boilerplate code we'd included from persona/browserid. Since the error message was not particularly useful or informative, I've just removed it, although it's possible we'll regret this later in the case of other errors.