This is really driving me nuts... Netflix is consistently giving me subpar resolution in firefox. It's quite rare that I even get 720p. Yet switching to microsoft edge, boom suddenly it's great.
There used to be some extensions to switch the resolution up on chrome and firefox, but I do believe they're not working anymore.
The notion here is, because of these annoying steps and gotchas, there will not be 4k rips of their content floating around. I don't keep up on the piracy scene these days but I have to imagine that it can still be done, as with the setup from the blog. So goes the story of DRM, it is a painful step that doesn't quite prevent piracy - but if you're netflix or other streaming services, you're working closely with the implementors of the DRM tech (microsoft, widevine, others) and you're not going to just throw in the towel given that it's always a work in progress.
Sometimes there are also licensing requirements around having DRM attached, probably applies to Netflix in certain cases (although less and less these days).
This is because of DRM integrations. If any part of the chain between netflix and secure memory in your display cannot be verified, or does not meet some standard, you get the degraded experience.
There used to be some extensions to switch the resolution up on chrome and firefox, but I do believe they're not working anymore.
Another case for piracy I guess.