I always use Facebook in a sterile browser that doesn't get used for anything else. Once Firefox released the container feature I've only ever used Facebook inside the Facebook container.
Why does that get a fail mark? In my opinion such promises are worth absolutely nothing. Does that compromise my anonymity somehow by disabling them?
"Setting your browser to unblock ads from websites that commit to respecting Do Not Track rewards companies that are respecting user privacy, incentivizing more companies to respect Do Not Track in order to have their ads shown at all. By preserving privacy-friendly ads, sites that rely on advertising funding can continue to thrive without adjusting their core business model, even as they respect users’ privacy choices."
https://panopticlick.eff.org/about#do-not-track
Claiming you're not protected because you've decided to block all does seem deceptive, though.