this post was submitted on 28 Aug 2024
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Firefox rolls out Total Cookie Protection by default to all desktop users worldwide | It is Firefox’s strongest privacy protection to date, confining cookies to the site where they were created (blog.mozilla.org)
submitted 3 months ago by [email protected] to c/[email protected]
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[–] [email protected] 5 points 3 months ago (2 children)

IIRC an iframe contents is treated as a separate window, so cookies aren’t shared either

[–] Feyd 6 points 3 months ago (1 children)
[–] [email protected] 2 points 3 months ago

That’s horrific WHY?

do not add any event listeners for message events. This is a completely foolproof way to avoid security problems. 🤡🤡🤡🤡🤡🤡🤡🤡🤡🤡🤡

[–] [email protected] 2 points 3 months ago (1 children)

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.