STR - Go to Settings - Go to Firefox Accounts, and log out if you're already logged in - Click Create account or sign in - Enter email address that is not registered with firefox account - Upon age verification window, press back - Enter email address that is registered with firefox account - Provide correct password Expected: - Login successful message, and user can exit to the settings list Actual: - User is presented with the message that should be shown when a new account is created. Pressing Next button does not do anything. User must manually exit by pressing X on top left. Version Info: Gaia 5827cb13b1a033141ce539e8fbd44cd0bf16593d Gecko https://hg.mozilla.org/mozilla-central/rev/690c810c8e3e BuildID 20140410040201 Version 31.0a1

this also happens in FTE as well.

Marking as nice-to-have: since few users will have an fxa account, this is an extreme edge case

Experimenting with a project whiteboard tag, "[fxa4fxos2.0]". Feedback welcome.

Unassigning from myself and setting to P4. The case will be very rare and the harm is not great.