this post was submitted on 16 Feb 2024
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Except Facebook keeps ghost profiles for unregistered users which are created and fed data just by visiting any site that has Facebook integration. They use browser fingerprinting to track activity across those sites and connect user activity to specific profiles, even if you never touch the "login using Facebook/share on Facebook" buttons.
firefox blocks this out of the box
Big issue is you don't know how well it does this. As you can't see the other side of the equation.
Even if it's perfect. Many times I need to use a chromium based browser to use a website properly (the website fault not Firefox). Additionally many apps are just web views that are based on chrome. It's hard to avoid this type of tracking.