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Fingerprintjs2

Original fingerprintjs library was developed in 2012, it's now impossible to evolve it without breaking backwards compatibilty, so this project will be where all the new development happens.

This project will use significantly more sources for fingerprinting, all of them will be configurable, that is it should be possible to cherry-pick only the options you need or just enable them all.

I'm also paying special attention to IE plugins, popular in China, such as QQ, Baidu and others.

This project will not be backwards compatible with original fingerprintjs.

This project uses semver.

Usage

new Fingerprint2().get(function(result){
  console.log(result);
});

You can pass an object with options (all of which are optional):

var options = {swfPath: '/assets/FontList.swf', excludeUserAgent: true};
new Fingerprint2(options).get(function(result){
  console.log(result);
});

Full list of options will be in the (https://github.com/Valve/fingerprintjs2/wiki/List-of-options) wiki page.

Flash font enumeration is disabled by default. JS code is used by default to get the list of available fonts.

The reason for this is that Flash will not work in incognito mode.

However, you can make the library to use Flash when detecting the fonts with:

excludeJsFonts: true

option.

To use Flash font enumeration, make sure you have swfobject available. If you don't, the library will skip the Flash part entirely.

All fingerprinting sources are enabled by default, i.e. you don't need to explicitly configure the library to include them.
new Fingerprint2().get(function(result){
  // this will use all available fingerprinting sources
  console.log(result);
});

View the fingerprint locally

You can view your browser fingerprint locally by starting a webserver and viewing the index.html page. Loading index.html from the filesystem won't work due to Flash's ExternalInterface security restrictions.

To start a web server you can use either Ruby:

ruby -run -e httpd . -p 8080

or Python

# will load on port 8000
python -m SimpleHTTPServer

List of fingerprinting sources

  1. UserAgent
  2. Language
  3. Color Depth
  4. Screen Resolution
  5. Timezone
  6. Has session storage or not
  7. Has local storage or not
  8. Has indexed DB
  9. Has IE specific 'AddBehavior'
  10. Has open DB
  11. CPU class
  12. Platform
  13. DoNotTrack or not
  14. Full list of installed fonts (maintaining their order, which increases the entropy), implemented with Flash.
  15. A list of installed fonts, detected with JS/CSS (side-channel technique) - can detect up to 500 installed fonts without flash
  16. Canvas fingerprinting
  17. WebGL fingerprinting
  18. Plugins (IE included)
  19. Is AdBlock installed or not
  20. Has the user tampered with its languages
  21. Has the user tampered with its screen resolution
  22. Has the user tampered with its OS
  23. Has the user tampered with its browser
  24. Touch screen detection and capabilities

Many more fingerprinting sources will be implemented, such as

  • Multi-monitor detection,
  • silverlight integration,
  • Flash linux kernel version,
  • Internal HashTable implementation detection
  • WebRTC fingerprinting
  • Many more

To recompile the FontList.swf file:

License: MIT or Apache, whichever you prefer.