All the major web browsers, including Mozilla Firefox, offer a private browsing mode that doesn’t record the history of where you’ve been or put any cookies on your device. But that doesn’t mean that websites can’t still track you. They can do this by putting code on the site — sometimes embedded into ads — which can track your presence.
The new feature, called “Private Browsing with Tracking Protection,” is in Firefox for Windows, Mac, Android and Linux and it “actively blocks content like ads, analytics trackers and social share buttons that may record your behavior without your knowledge across sites,” according to a Mozilla press release.
To access this feature, make sure you have the latest version of Firefox and then open a Private Browsing Window. It only works within private browsing windows, which you access from the Firefox File menu.