First-Party Isolation in Firefox and what breaks if you enable it
In Summary : Instead of modifying and blocking page contents; Firefox optionally lets users modifies the browser to become harder to track...
https://updatesinfosec.blogspot.com/2018/09/first-party-isolation-in-firefox-and.html
Instead of modifying and blocking page contents; Firefox optionally lets users modifies the browser to become harder to track across websites. [...]
kindly refer the following link as follow up :
https://ift.tt/2JRz3dQ