In the latest update for Firefox 72, launched on 7 January 2020, Firefox protects against advertising companies that track users through a technique known as “Fingerprinting.”
Advertisers and other trackers create an online profile by storing data such as the web browser, installed fonts, plugins, time zone, and screen resolution. Each user has its settings. If advertisers store this data, they can create a profile of each online user.
Firefox 72 blocks all requests made by companies known to use fingerprinting.
In the future, Mozilla Firefox will also add scripts and protection via APIs to Firefox. Disconnect has compiled the list Firefox uses to block advertisements and trackers. Disconnect is a company that maintains a list of known advertising networks and other online trackers.