This works perfectly on Chrome and all other browsers. Its only Firefox which is a problem. So its for Mozilla to explain why they are going against the standards and other browsers.
It would not be the only Web standard that acts against the users (WebRTC enumeration of IP addresses, canvas fingeprinting, 3rd party cookies, many others come to mind).
One could make the case Firefox is trying to 'protect users' if they resisted or protested any of the user hostile standards you mention, but Firefox has implemented all of them.
It's just this case and this is not 'user hostile'. If they are going their own way there must be transparency, disclosure and reasoning. But in the bug reports they are denying it.
When it comes to the bigger topic of standards, they are meant to increase interoperability. However, there are many ways to interoperability, and they can serve different masters. Seeing how standards are just codified behaviours, they are similar to law, and it's quite clear that law is not always good. Civil disobedience is widely recognized as a valid way to influence laws.
In this light, I would say breaking standards can be a form of civil disobedience, if the standard doesn't serve the regular, disenfranchised person.