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A comment on Firefox 85 cracks down on supercookies. Parent comment

Re:Firefox 85 cracks down on supercookies by callmeal on Tuesday January 26, 2021 @02:48PM (#25920273)
Instead of thinking "same image on different domains, think "hidden uniquely-named single pixel image".
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Re:Firefox 85 cracks down on supercookies by kortilla on Tuesday January 26, 2021 @05:57PM (#25922026)
That’s the same thing. In order for that tracking method to work, this uniquely named pixel has to be loaded while visiting multiple sites. So it ends up being multiple domains referencing the same image from some tracker resource.
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Re:Firefox 85 cracks down on supercookies by bigiain on Tuesday January 26, 2021 @06:43PM (#25922401)
So a Facebook like button? Or a Twitter logo link?

I suspect you'll find this is _way_ more common than you expect.

(Also, if you thing Goog aren't doing this with their font CDN or various javascript library coaches, even (or especially) for sites without Google Analytics... I've got a bridge to sell you...)

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Re:Firefox 85 cracks down on supercookies by tuna-piano on Tuesday January 26, 2021 @11:28PM (#25924289)
It would be easy to check that...
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