No to the automatic injection (nothing happens). If I click the Passter icon, there's no right-green arrow for injection. I have to click on passwords and get the password page, then select a website, and then it appears next to the account. Clicking that green arrow opens the page, but no injection.
I tried calling the doLogin() func from the console. It returns false.. and similarly opens the page, but no password injection. I'm not sure how the hook (presumably there's some kind of 'page loaded' hook set) to make use of the loginUser that is set works, or how to debug that, or if I can. I would be quite happy to debug this - or some kind of mocked up version that might help replicate the problem (ie that uses a similar technique to log in with 'foobar' or some such fixed nonsense word).
(sorry for the delay - I half wrote this response before, but managed to not send it).
//.ichael G.