Earlier quoted context omitted.
Won't ublock [1] solve that by blocking that kind of scripts from loading? [1] https://www.ublock.org/
There are other ways that facebook can track you, ublock does counter a lot of it but there is a constant stream of innovations and work arounds by tracking companies to keep a hold on you. I think the financial motivation for them to keep tracking you outweighs the effort ublock can put into stopping that. The firefox container is a legitimately novel approach to stopping the problem though I'm certain it will be at…
uBlock Origin with either "Fanboy's Third Party Social" or "Fanboy's Social Blocking List" selected will block all third-party connections to Facebook servers, period. Of course Facebook can still spy on you via other spy companies, but the "EasyPrivacy" list cuts that down a lot too.
On the other hand, Facebook Container still happily connect to Facebook servers from third-party websites, leaking your IP, useragent, the URL of the webpage you're viewing, headers containing fingerprinting information like fonts , etc. Facebook Container does one thing and one thing only: strip off the Facebook cookie. But this is almost worthless from an information theoretic perspective, because Facebook can trivially de-anonymize you through IP/timestamp/header correlation.