I've tried using addons like uMatrix in the past and always gave up, but this just convinced me to deal with the (minor-ish) annoyance they add. Canvas fingerprinting is somewhat well-known and there are browser extensions to block it. But if TikTok is doing audio fingerprinting then you can bet FB, Google, and everyone else are doing it too. JS is too feature-rich to be safely used & allowed.
I haven't found a way to block canvas fingerprinting. For some reason, I haven't been able to default to block in firefox.
Even with CanvasBlocker the "check your fingerprint" sites still show a unique fingerprint (but canvasblocker has a ton of really obscure options that I don't understand)
> Even with CanvasBlocker the "check your fingerprint" sites still show a unique fingerprint (but canvasblocker has a ton of really obscure options that I don't understand)
It always be unique, because it's randomly generated. But every visit will have a completely different unique value, which means that the fingerprint from the canvas is a useless value.
The setting in Firefox about:config privacy.resistFingerprinting includes mitigations for some canvas fingerprinting attacks. It's part of a push to bring into Firefox privacy features from the TOR project.
