They found a way to track users activities online with finger printing, but We got noScript add on in firefox and I think they r forgetting.

https://arstechnica.co.uk/security/2017/02/now-sites-can-fingerprint-you-online-even-when-you-use-multiple-browsers/

more over here

http://www.idcloak.com/learning-center/noscript-chrome-noscript-firefox-browser-fingerprint-protection/a583.html

What is it?

read over here

https://github.com/Valve/fingerprintjs

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