Sniffly2 is a variant of Sniffly which abuses HTTP Strict Transport Security headers and the Performance Timing API in order to sniff your browsing history in Chromium-based browsers.
Visit http://diracdeltas.github.io/sniffly in Chrome/Chromium/Brave/etc. with HTTPS Everywhere disabled.
Caveats:
- does not work on mobile or Firefox
- does not work over HTTPS due to mixed content blocking.
- adblockers may taint results
- crbug436451, reported by
imfaster...@gmail.com, for the idea of probing port 443 over HTTP - Scott Helme for providing an initial list of HSTS hosts