I use uBlock Origin and Privacy Badger on my desktop and phone, as well as Blokada, and yet Facebook still had a bunch of app activity even though I never ever sign in to stuff using FB (or even gave the apps my email or any other piece of personal data).
I literally just opened the app, granted no permissions, used it a bit, and Facebook associated it with my account. What the fuck.
Re:Off-Facebook activity
by the_snooze on Wednesday January 29, 2020 @09:14AM
(#22180647)
They could be associating you server-side using persistent identifiers on your phone. For example, if an app has the Facebook SDK, it could send your IMEI to Facebook. Then, if you have a first-party Facebook app like Messenger, that too can send your IMEI to Facebook and link it back to your Facebook account.
- use Facebook pixel tracking on the site.
- hand over all of their user's email addresses to use for audience building.
Or most likely both. Creepy stuff indeed.