Seems like a lot of people <http://www.theregister.co.uk/2018/04/24/private_web_browsing_study/> have the wrong idea about what is really “private” in private browsing mode. Many of them believe that * Activity while logged into an account (e.g. Google) will not be saved in that account’s history * Bookmarks made in private mode are not visible in standard mode * It prevents websites from tracking their location * It affords better protection against malware * It obscures their IP address. None of which is true. To its credit, when you open a private window in Firefox, it clearly states the things that are hidden and the things that are not.