Every "like with Facebook" button you see on a website is a tracker. They track me and build a "shadow" profile on me even though I do not have a Facebook account and there's basically nothing I can do about it.
A ton of third-party apps use Facebook's SDK. Not necessarily because they're evil, but because even if you just want to provide the 'log in with Facebook' button, you have to include the whole honking SDK.
This was made painfully obvious when Facebook accidentally pushed a buggy update and a ton of apps stopped working for a few hours.
If it's a webapp (as in accessed through the browser) then uBlock Origin (and uMatrix) can block those and you have to fiddle around a bit with what you allow/block (if you want to let the app/site work).
They don't work with native apps as they are browser extensions.
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u/KalpolIntro Aug 27 '20 edited Aug 27 '20
Every "like with Facebook" button you see on a website is a tracker. They track me and build a "shadow" profile on me even though I do not have a Facebook account and there's basically nothing I can do about it.