http://privacyy3tsy4mge4qmg4nsid2vnhl7szzupphhkfsxvayx5tl2ztbqd.onion/cloudflare-and-signal/leak-user-location.html
To quote the kid, "A few months ago, I had a lightbulb moment: if Cloudflare stores cached data so close to users, could this be exploited for deanonymization attacks on sites we don't control?" Further, "When your device sends a request for a resource that can be cached, Cloudflare retrieves the resource from its local datacenter storage, if available.