It works on chromium, not firefox. I guess I should be more flexible. It is likely that the bug is in the bank’s site, so I wasn’t sure about putting in a bug report. The website pauses on the ‘loading’ animated icon, when you try to navigate away, it tells you ‘Your session has expired’. It hasn’t been fixed by changing the user-agent (assuming I got it right). I don’t know if the bank would give them a dummy account for testing, but I’ll file a report anyway.