mozilla/kitsune — pull request #1619 by shuhaowu (2013-09-14 16:21:59+00:00)
Title: [Bug 914268] Suggests username during signup

Added suggested username to persona signup.

One interesting case for this method is if the user sign up with
something like: john1@gmail.com and john1 is taken. The suggestion will
be john1[0-9]+

However, I think this is acceptable.

Someone should evaluate the performance implication of this commit..