A web page that tells you what your browser gave away the moment you arrived. No login, no form, no permission. Most pages do this. None of them tell you.
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.
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.