There's an awesome browser fingerprinting demo at

And I'm pleased to catch most (all?) of their fingerprinting techniques :)

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@kravietz I gave up trying. Don't want to pretend to be running Linux or Mac otherwise everyone will be keep on saying that BSD is dying.

@saper Most of these are actually easy to hide and 100% voluntarily given out by browser

@kravietz Oh dear. They are telling me my preferred content language HTTP request header is all time _unique_. Let that sink in. I guess all my paranoia browser addons are useless if I let my browser tell websites that I speak German, British English, American English, and French, in a certain order of preference (no idea why I did that in the first place). πŸ€¦β€β™‚οΈ

Also, media devices are unique (understandable). Fonts are pretty bad. Oh dear. I guess that would mean disabling JS by default again.

@blipp Precisely, language was my first target too.

User agent was the second but these are quite fragmented too :)

But before you go any further just try with Tor Browser as this is perhaps the furthest you can go (no JS, addons)

@kravietz Good suggestion to try with Tor Browser, will do :)

Is JS needed for font fingerprinting or can you just define webfonts as fallbacks to sets of system fonts and check in the server logs which have been loaded?


@guenther @kravietz Good question. At least on this fingerprinting test website, fonts were listed under the category JS. Your proposal for web font tracking sounds plausibel, too.

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