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kkapsner / CanvasBlocker

A Firefox extension to protect from being fingerprinted.
https://canvasblocker.kkapsner.de
Mozilla Public License 2.0
1.17k stars 87 forks source link

no fake readout on amiunique.org #51

Closed monperrus closed 8 years ago

monperrus commented 8 years ago

I try this extension on amiunique.org. It detects the canvas fingerprinting and a notification pops-up, but it seems no to deliver a fake result, because the "view details" page still display the generated canvas.

kkapsner commented 8 years ago

The result is faked. The changes are too small to be seen by human eyes (you can see them if you look closer in the orange part - you see some speckles) but will change the produces hash.

monperrus commented 8 years ago

If I understand correctly, this means that the produced hash is unique for every run?

kkapsner commented 8 years ago

Should be (if the picture is not complete black). If not your rng is broken.

slrslr commented 2 months ago

@kkapsner On each reload of the page https://amiunique.org/fingerprint it always shows the same HTML5 image canvas, value "6 - Canvas". Note that I have re-enabled the CanvasBlocker 1.10.1 (CB) during my current browser (FF 129.0) session and not restarted the browser yet. CB button shows a successful protection for: canvas, screen, history. CB is set to blocking mode "fake" and "readout". https://coveryourtracks.eff.org on other hand shows: "randomized by first party domain" and" Bits of identifying information: 1.67; One in x browsers have this value: 3.17". Any idea please?