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I dont think this is a proper way to test it.

It matters more how unique your fingerprint is than how consistent or reproducible it is. Just testing if you get the same fingerprint back on your second visit doesn't tell you much if you don't know how many people "share" your fingerprint.

As a silly example, if you gave all users the same fingerprint, it would be very consistent but also useless as a tracking method.

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On the demo they have previous visits from your fingerprint listed (so you can get an idea of how common the fingerprint is... at least once enough people have tried the demo). Mine had two visits listed which are not mine when using Safari and private relay. On Firefox there were none (and it tracked in normal and private mode).

On my iPhone, I was surprised to see I had made 20+ visits when in reality that was my first visit to fingerprint.com. It makes me feel better that my fingerprint isn't actually unique!

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