If it works on chromium I’d consider that even if it is a quirk on the bank website, chromium is handling it cleanly and allowing you to use the site. That’s something we probably want incorporated in Firefox. I’d encourage submitting the bug report to Mozilla, and don’t assume too much about what they can/cannot do!
Nah Conquest of Bread is not really that technical haha, and also rage inducing so should be a good combo 😂