Private Browsing with Tracking Protection When you browse in a Private Window, Firefox does not save: visited pages cookies searches temporary files Firefox will save your: bookmarks downloads Private Browsing doesn’t make you anonymous on the Internet. Your employer or Internet service provider can still know what page you visit. Tracking Protection Some websites use trackers that can monitor your activity across the Internet. With Tracking Protection Firefox will block many trackers that can collect information about your browsing behavior. See how it works Learn more about Private Browsing.