Are all fingerprinting techniques used in the wild pretty generally well-known? Do any browsers have an option to blindly return a standard set of values regar

Are all fingerprinting techniques used in the wild pretty generally well-known? Do any browsers have an option to blindly return a standard set of values regardless of actual client capabilities/metrics? (i.e. make it difficult to achieve more granular results than browser agent). I know Mozilla made an anti-fingerprinting announcement recently but IIRC all it does is check scripts against a blacklist: https://blog.mozilla.org/futurereleases/2019/04/09/protections-against-fingerprinting-and-cryptocurrency-mining-available-in-firefox-nightly-and-beta/ https://blog.mozilla.org/futurereleases/2019/04/09/protectio...