Hello, smart people. Filling out an online form to volunteer for something, Firefox's Facebook-fence icon appeared on the email field. Confused, I clicked on its question mark. On the next page, Mozilla wanted to sell me Firefox relay for $7/mo. (That's their VPN + email masking + phone masking.) I used my yandex.ru email address instead for $0. Here's the question: is Facebook really able to track me because I've signed up to volunteer for Cornel West (setting aside the FB-Russia blockage issue)? Thanks.
is Facebook really able to track me
Oh yes. The "like" buttons on websites are also used for tracking people, so any website that is Facebook-enabled will know who you are. Additionally, browser fingerprinting makes it difficult to stay anonymous, even without an account.
More or less, it's the worst-case scenario. Governments of many countries have sued and fined the crap out of them for obtaining data in a way that is illegal. But they make so much money with that data that they almost ignore the concern.