this post was submitted on 28 Aug 2024
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Does this stop me from adding to my website an iframe to facebook where facebook can keep its cookies for my user? That would be great but I doubt it.
IIRC an iframe contents is treated as a separate window, so cookies aren’t shared either
Sure, but the separate window can be on a different domain. Now you have a way to share cookies across multiple websites on different domains if all of them include an iframe to this external domain. And you can use in-browser messages (see window.postMessage()) to communicate between iframes and main window.
Indeed see sibling comment https://programming.dev/comment/11983146