More from the article ...

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Fingerprinting, which involves gathering detailed information about your browser's or your phone's settings, falls into this category. The tracking method is largely hidden, there's not much you can do to stop it, and regulators have done little to limit how companies use it to follow you around the internet.

What Is Fingerprinting?

The exact configuration of lines and swirls that make up your fingerprints are thought to be unique to you. Similarly, your browser fingerprint is a set of information that's collected from your phone or laptop each time you use it that advertisers can eventually link back to you. ...

@#2

My results are:

... Our tests indicate that you have strong protection against Web tracking.

Is your browser:

Blocking tracking ads? Yes

Blocking invisible trackers? Yes

Protecting you from fingerprinting? Your browser has a unique fingerprint
...

Maybe that's why Facebook seems to be questioning my logins so much?

My tactics may be working.