DuckDuckGo Plus for Firefox is an extension for Mozilla Firefox. It is a search engine that does not track you. To show you instant answers in the address bar, your typing in the address bar is sent to DuckDuckGo servers automatically. However, as in line with our privacy policy, no personally identifying information (including IP address) is collected or stored in this process. It adds a handy toolbar button for easy access to bang tags and DuckDuckGo instant answers to Google or Bing.