Third party cookies, and any way to fingerprint a specific user starting from high entropy user agents to screen resolution, font fingerprinting or canvas data, should be considered a breach of the browser security model. All sites should run in containers and no advertiser should be able to track you across sessions. When I want 3rd party interaction, I should need to opt in and connect the current site with Faceboo…
Exactly. Why aren't all websites run in containers by default (personally I'm envisioning per-domain containers)? What benefit do we get from full-coverage containerization not being the default?
[1]: https://addons.mozilla.org/en-US/firefox/addon/multi-account...
[2]: https://addons.mozilla.org/en-US/firefox/addon/temporary-con...