The web page embeds a short javascript code to retrieve information from users and we can use these information to uniquely identify people.
- window.navigator (app code name, version, cookie enabled, platform, ...)
- window.screen (width, height, ...)
- browser display (inner/outer width/height)
- plugins
- CSS fonts
- system fonts

Note. Part of the codes are from Joel Segerlind.

Fingerprints of your browser: