this is principle of 1x1 pixel images for tracking users
I think a normal pixel tracker (like Facebook's) doesn't do this. It only sends it's own (Facebook's) cookies together with the request, so it doesn't need to "steal" any cookies since this is normal browser behavior (not anymore on Safari)
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I think a normal pixel tracker (like Facebook's) doesn't do this. It only sends it's own (Facebook's) cookies together with the request, so it doesn't need to "steal" any cookies since this is normal browser behavior (not anymore on Safari)