Normally I wouldn't care too much about Google, the problem is that in Australia, reCAPTCHA is used by Westpac bank, for processing payments on behalf of the Department of Education of New South Wales. In other words, you can't pay your child's public school fees online, unless you agree to Google tracking you.
How to test:
create a form with reCAPTCHA or just use a pre-existing one like [2], then try and solve the reCAPTCHA while resistFingerprinting is set to false (default setting)[1]. Now change it to true, and try to solve the reCAPTCHA once again.
[1] https://support.mozilla.org/en-US/kb/firefox-protection-agai...