I appreciate you taking the time to dig into this.
You're right, if no events are attached to the button it will not work. However, those events are attached using JavaScript which is often blocked by browsers being a bit overzealous on privacy/security. It may also be that something got updated as part of a routine security upgrade which is now breaking it for your specific browser.
I'm afraid we can't support outdated browsers - it would be a very poor use of our limited developer time to test every possible variant of every browser. We prioritise support for the latest versions of the most popular browsers used by our community in their default configuration (no add-ons or optional settings enabled). The list of browsers is as follows:
Google Chrome
Mozilla Firefox
Microsoft Edge
Opera
Yandex
Chrome Mobile
Safari Mobile
I would recommend that you at least use the latest Firefox to avoid problems like this in future.
It's safe to say if this were a problem on our end, many more users would be reporting it. Unfortunately, something specific you set up is causing the problem.