I second this; I have never been "into" these problematics and as a user I generally just disallow everything I can, which can be a pain (I mean I do want to often don't store anything when I'm browsing the web, which leads to meeting a lot of "cookie banners"). While there are probably browser extensions that can perform the automatic opt-out, it would be nice if browsers provided an API as an unified and centralized way to communicate consentment as a set of privilege access to different browser features and APIs (you could e.g. forbid the use of canvas, or even JS entirely).

But that's only a small part of a huge legal frame, and as I said I don't know much about these problematics.