Well, I’m glad you asked, it seems to login ok but then when back on the site, it doesn’t show the user menu, it just shows the login button again under the User nav link.
I’m starting to wonder if it is cookie related but it works fine in Chrome, it’s almost as if the “logged in” check is being ignore on initial page load, a refresh reveals all the user navigation items for a logged in user, I want to stress that it only happens in Firefox