Firefox is a multi-tabbed, open-source web browser. It has a Private Browsing that automatically removes history, searches, and cookies to protect your privacy. Tracking Protection minimizes the ability of hidden third parties from tracking your browsing activity across many sites. You can sync Firefox wherever you use it to access your bookmarks, passwords, tabs and more from any smartphone, tablet or computer. You can choose what parts you want to sync and where you want to sync them.