From EFF.org:
EFF is excited to announce that we are releasing version 1.0 of Privacy Badger for Chrome and Firefox. Privacy Badger is a browser extension that automatically blocks hidden trackers that would otherwise spy on your browsing habits as you surf the Web.
More than a quarter of million users have already installed the alpha and beta releases of Privacy Badger. The new Privacy Badger 1.0 release includes many improvements, including being able to detect certain kinds of super-cookies and browser fingerprinting—some of the more subtle and problematic methods that the online tracking industry employs to follow Internet users from site to site. Other enhancements in Privacy Badger 1.0 include: significant UI improvements, translation into 4 different languages (with more on the way), easier customization of your Privacy Badger settings, improvements to stability, and support for Version 1.0 of EFF’s recently announced Do Not Track Policy.
Read more on EFF.