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A web page that shows you everything the browser told it without asking
(sinceyouarrived.world)
This is a most excellent place for technology news and articles.
Try Deviceinfo.me
Now that one goes after a whole lot more info than the other. I was pretty happy to see the amount of "unknown" and "permission not granted or denied" responses though.
That's not necessarily great either though, because that "unknown" becomes your unique fingerprint that almost no one else has. Ideally you to have spoofed information with the most common parameters, or even better, randomized ones.