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I am not a big fan of Mozilla (though I still use it because it is the least bad browser for me) but you can already set:

privacy.resistFingerprinting to 'true' in about:config

It is not perfect, of course, but helps a lot. Expect some sites to break.

privacy.resistfingerprinting is strictly for advanced users. Always attach a huge warning when asking people to enable it.

Examples of breakage - while enabling 2FA on any site, or using sites that offer the ability to edit photos, canvas picker, etc.