To fingerprint you, a site sends code to your browser that draws an invisible element on the page you're viewing. Bleeping Computer's Catalin Cimpanu points out that the anonymity-focused Tor browser has offered this protection for years, and this type of thing has happened before. The Tor browser is built around the Firefox code and Mozilla will implement privacy features that have proven successful in the Tor browser and bring them to mainstream Firefox users. It's pretty clear why someone using the Tor browser would want to avoid being fingerprinted, but why does the average Firefox user need a feature like this? Protect Your Browser TodayGoogle Chrome users can install the Canvas Defender extension to protect themselves against unwanted browser fingerprinting.
Source: Forbes October 30, 2017 15:00 UTC