Browser fingerprinting is on a collision course with privacy regulations. Compared to more well-known tracking “cookies,” browser fingerprinting is trickier for users and browser extensions to combat: websites can do it without detection, and it’s very difficult to modify browsers so that they are less vulnerable to it. As cookies have become more visible and easier to block, companies have been increasingly tempted to turn to sneakier fingerprinting techniques.
But companies also have to obey the law. And for residents of the European Union, the General Data Protection Regulation (GDPR), which entered into force on May 25th, is intended to cover exactly this kind of covert data collection. The EU has also begun the process of updating its ePrivacy Directive, best known for its mandate that websites must warn you about any cookies they are using.