I get that some things like screen resolution and basic stuff is needed, however most websites don’t need to know how many ram I have, or which CPU I use and so on. I would wish for an opt-in on this topics: So only make the bare minimum available and ask the user, when more is needed. For example playing games in the browser, for that case it could be useful to know how much ram is available, however for most other things it is not.

It would be nice to hammer a manually created fingerprint into the browser and share that fingerprint around. When everyone has the same fingerprint, no one can be uniquely identified. Could we make such a thing possible?

But why would any browser accept access to those metadata so freely? I get that programming languages can find out about the environment they are operating in, but why would a browser agree to something like reading installed fonts or extensions without asking the user first? I understand why Chrome does this, but all of the mayor ones and even Firefox?