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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.
Similar results with NoScript.
The fact that they're stopped from "the telling" says a lot about their abilities, but not much about "the disclosure".
I imagine it was just stuff collected in most server logs: IP Address, user agent string... I'm not too concerned, really.
Looks like they don't have a dedicated backend dev. A similar presentation could be done by making it a dynamically generated page, with some CSS animations.