The disclosed computer-implemented method for protecting user data privacy against web tracking during browsing sessions may include (i) detecting a user request, including a private domain, for a website in a web browser address bar during a browsing session, (ii) separating, utilizing a browser container, a user browsing state associated with the private domain from other domains during the browsing session, (iii) routing the user website request to one or more servers in a random order to run the browsing session, (iv) performing a browsing state security action that protects against cross-website tracking by discarding user browsing state data collected during the browsing session, and (v) performing a web isolation security action that protects against use of browser fingerprint data for conducting malicious attacks based on the routing of the user website request to the servers in the random order. Various other methods, systems, and computer-readable media are also disclosed.