http://privacyy3tsy4mge4qmg4nsid2vnhl7szzupphhkfsxvayx5tl2ztbqd.onion/how-to-stop-browser-fingerprinting/index.html
Not only can Javascript fingerprint, but it can actually run code you can’t preview first on your computer that can do malicious things, such as reveal your IP address through Tor, figure out your computer’s MAC address, or identify your motherboard and processor based on calculation speeds.