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I remember reading or watching about a privacy focused guy writing a tool (a browser extension?) that emitted a click for every time a site leaked your privacy. I know, it's a vague description. I'm trying to find if such a thing actually exists as a #firefox extension, just to test how radioactive sites actually are. The closest I get are the stats from uBlock Origin:

Blocked on this page: 26 (48%)
Blocked since install: 172,340 (34%)

This on my corpo account with the default uBO config.