How does private browsing mode work?

How does private browsing mode work?

Without private browsing, your browswer tells websites–and their owners–all kinds of things about you like what device you're using, where you are, what sites you've visited and when. Websites use this information to serve you relavent ads, but it can also be used to track your location and browsing habits.

With private browsing, your browser window is isolated from the rest of your operating system. Isolating the browser is supposed to help block websites from seeing who you are, block cookies and prevent access to your browsing history, but even when using private browsing, the EFF's Panopticlick privacy test could see what device I was on, where I was connecting, if I could accept cookies, my OS, and tonne of other personally identifying information.