A facebook employee explained me how tracking works. Its not the email address Meta is concerned about. Its the IP, device identifiers and location. Meta doesnt care about the email at all apart from sending you emails for notification. Even with a fake email they exactly know who you are. Let’s say you visit CNN.com which has facebook tracker. Facebook has the IP and the device identifiers. Now you login with fake email account on Instagram, facebook knows that’s the IP ans the same device hence it “must” be the same person That’s how facebook creates shadow profiles.
I still use uMatrix to block javascript and other shit by default, then enable as needed.
there’s an unfortunate tension between privacy and anonymity (and usability): the more you change about your behavior and system to preserve privacy, the more you stand out as a unique individual.
Multi-tiered threat modeling is a good way to find the best of as many worlds as you can tolerate. Maybe you use tor browser for anything it doesn’t hopelessly break. Use hardened firefox for other things. Vanilla firefox profile for when a site doesn’t work for whatever reason. Chromium when necessary. By dynamically shifting between security levels as your threat model necessitates, you can maintain usability while preserving some amount of privacy. The downside is time and effort, but baby steps are fine. Switch out corporate apps and services with open source ones over time. There’s decent-to-great alternatives for most things microsoft/google