I’m glad it acknowledges explains the impacts of anti-fingerprinting measures. I’ve seen some others assume that a random canvas is unique rather than one of the many people randomising it the same way, leading to a false “unique” assessment.

Your browser appears to be returning the viewport in place of the real screen — anti-fingerprinting at work. The substitution is itself distinctive.

Your browser masked your graphics processor. Firefox and Safari have started returning generic strings — “Mozilla”, “Apple”, “or similar” — instead of the real renderer. The fact that yours did so tells us, with reasonable confidence, which browser you are running. The mask is also a fingerprint.