Today’s release of Total Cookie Protection is the result of experimentation and feature testing, first in ETP Strict Mode and Private Browsing windows, then in Firefox Focus earlier this year. We’re now making it a default feature for all Firefox desktop users worldwide.
Okay, I could be wrong about this, but …
My understanding is that from e.g. Facebook’s perspective, they previously would be able to see that you visited a newspaper website, and then a food delivery website, and then a furniture review website (assuming all of these websites had Facebook like/share/login buttons somewhere, and even if you never click these Facebook buttons)
But, with Total Cookie Protection, from Facebook’s perspective, they know someone visited the newspaper website, and they know someone (maybe someone else) visited the food delivery website, and they know someone (maybe yet another person) visited the furniture review website: they can’t connect the dots
However, the above example assumes that you aren’t logged in to Facebook
I’m actually not sure how this would be different if you were logged in to Facebook
Or, what if you actually did want to use the Facebook login on all of these websites? I suppose from Facebook’s perspective you have 3x different computers? And in terms of user experience, you have to log in to Facebook 3x times?
Thank you for your reply. What you described looks a lot like First Party Isolation: https://www.ctrl.blog/entry/firefox-fpi.html I don’t see how this is different, save for the fact that Total Cookie Protection (TCP… never seen this acronym before lol) does less than FPI.
FWIW, Total Cookie Protection was previously called Dynamic First Party Isolation and it is indeed one of the FPIs.
The name is mentioned in the Firefox Security Newsletter as follows:
Thank you for the clarification 👍🙏