Finally, Mozilla released a version of Firefox that has been optimized for 64-bit Windows systems. The new version will work on Windows 7/8/8.1 and 10.. You can find it on the “Firefox All Systems” page from Mozilla. This newest version will allow for added performance in applications and games. There may be additional plugins required for the new version. Also, Mozilla released a new feature in Firefox called “Private Browsing with Tracking Protection”. Users can now block additional trackers while browsing and prevent sites from gathering data about web activity.