Mozilla blocking third-party cookies Total cookie protection is also known under the technical term state partitioning is supposed to prevent cross-site cookie tracking probably the most common method for web tracking. To better understand what has changed. Let’s look at how cookies were managed before, When you browsing the web, Visited websites can store cookies in the browser which are mostly used for saving logins and settings. When the same advertising network has ads embedded on multiple websites. They can set and read their cookies on each of those websites and therefore collect a list of sites that each browser (of course User) has accessed in the past. This easy tracking method was partially made harder over time by, for example, blocking third-party cookies, but blocking all third-party cookies can break some websites with legitimate users like single sign-on services from Google or Facebook Or embedded content like tweets. That’s why Firefox doesn’t block al...