Comment 1 for bug 1324848

Further investigations reveal this error in the logs:

Opening: popup window https://accounts.google.com/AddSession?hl=en&service=mail&continue=https://mail.google.com/mail/mu/mp/100/?login%3D1 in the browser window.
[0530/095138:ERROR:browser_main_loop.cc(240)] <unknown>: Unable to dispatch url 'https://accounts.google.com/AddSession?hl=en&service=mail&continue=https://mail.google.com/mail/mu/mp/100/?login%3D1':GDBus.Error:com.canonical.URLDispatcher.BadURL: URL 'https://accounts.google.com/AddSession?hl=en&service=mail&continue=https://mail.google.com/mail/mu/mp/100/?login%3D1' is not handleable by the URL Dispatcher

There are 2 issues here: url_dispatcher should be able to dispatch the link. But in the first place, the popup should open in the webapp container, since it is still part of the valid URL patterns.