That could change in a future version of Firefox though as Mozilla is considering giving the popular browser a more advanced mode of private browsing. The mode is dubbed Super Private Browsing, and it does what the standard private browsing mode doesn’t – make your browsing anonymous.
— The Tor Project (@torproject) May 9, 2019 The way this is done is by integrating Tor into Firefox. For those who not familiar with the name, Tor is a network that routes and encrypts your internet traffic. However, the price of this internet anonymity has always been the notoriously slow speed when using Tor. Hence. it is not surprising that it is one of the factors Mozilla is monitoring before it decides if a Tor integration is feasible. Since Mozilla is still looking for researchers to apply for its research grant to do this, it may take a while before we see Tor being integrated into Firefox. Until then, Tor has its own browser if you feel the need to use it. (Source: Mozilla // The Tor Project)