U.S. researchers developed a set of cross-browser fingerprinting (CBF) techniques to identify underlying hardware components and snoop on users. The trick lies in making browsers perform operations using computer hardware rather than staying in-program and tying these hardware components to specific systems. Using the browser parameter hardwareConcurrency, researchers were able to determine unique maximum thresholds. All major browsers are vulnerable to these techniques, except for the Tor browser, which intentionally normalizes outputs to obfuscate user details.”]