[jonsolo]

Can you read favicons from JavaScript or from the server side? I know you can set them from JS, don’t know about reading.

If so could you use steganography to encode a unique ID into the icon itself, then read it back to retrieve the fingerprint.

[jonasstrehle]

This idea was indeed my first approach, but favicons on the client side cannot be loaded from the F-Cache via JavaScript, but are ALWAYS requested from the server via get-request, which fortunately thus does not allow fingerprinting. ~jonas

[jonsolo]

Makes sense, and I agree that is good behavior! Thanks for clarifying.