this post was submitted on 22 Sep 2025
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Firefox

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why would my privacy settings mess with this? (lemmy.blahaj.zone)
submitted 1 week ago by carotte@lemmy.blahaj.zone to c/firefox@lemmy.world
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cross-posted from: https://lemmy.blahaj.zone/post/32127303

TranscriptScreenshot of a pop-up. It reads:

Color Inaccuracies Detected.

We have detected that your browser may have issues with color accuracy.

You may notice subtle visual noise and incorrect colors appear in your skins.

This issue is usually caused by anti-fingerprinting privacy settings in your browser.

Learn how to fix [with a hyperlink to a help page]

this screenshot was taken on Miners Need Cooler Shoes

does anyone know what would cause this precisely? why would anti-fingerprinting mess with the colors i use to edit an image in the browser?

i'd be tempted to brush this off as the website being malicious and lying to get me to deactivate fingerprinting protection, but the website is fully open-source and what they describe happened to me on Piskel (a pixel art editor, which would constantly mess up my colors in subtle but annoying ways)

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[–] JonnyKreng@lemmy.ml 10 points 1 week ago

The fingerprint method is named Canvas Fingerprint. It uses the canvas component to build a fingerprint of your PC. By adding random noise to the canvas the canvas is altered slightly by the browsers anti tracking feature and the detection does not work. I don't know how the canvas fingerprint itself works.

[–] GottaHaveFaith@fedia.io 5 points 1 week ago

If I had to guess, there are various fingerprinting techniques, and some of them use things like drawing on canvases to track you. They are probably referring to that.

[–] BakedCatboy@lemmy.ml 3 points 1 week ago

I had similar issues with canvas fingerprint prevention, the noise added to the canvas messed with photo uploads on sites that gave you a little editor. That used canvas I assume and all my uploaded pictures would end up tinted various shades of green/purple I think. So I had to just not use that setting.

[–] ReedReads@lemmy.zip 2 points 1 week ago

Best practice is to have a second browser or profile for specific sites that require you to disable fingerprint protections.

Source: https://github.com/arkenfox/user.js/wiki/3.3-Overrides-%5BTo-RFP-or-Not%5D