Facebook Shadow Profiles

@article{Aguiar2022FacebookSP,
  title={Facebook Shadow Profiles},
  author={Luis Aguiar and Christian Peukert and Maximilian Schafer and Hannes Ullrich},
  journal={SSRN Electronic Journal},
  year={2022}
}
We quantify Facebook’s ability to build shadow profiles by tracking individuals across the web, irrespective of whether they are users of the social network. For a representative sample of US Internet users, we find that Facebook is able to track about 40% of the browsing time of both users and non-users of Facebook, including on privacy-sensitive domains and across user demographics. We show that the collected browsing data can produce accurate predictions of personal information that is… 

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