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websites like piratebay use your cpu to mine cryptocurrency like bitcoin litecoin etc...
Solutions :
extensions for google chrome
https://chrome.google.com/webstore/detail/no-coin-block-miners-on-t/gojamcfopckidlocpkbelmpjcgmbgjcl
OR
2)https://chrome.google.com/webstore/detail/minerblock/emikbbbebcdfohonlaifafnoanocnebl
▶️ DTube
▶️ IPFS