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andreu@andreubotella.com ("Andreu Botella :verified_enby:") wrote:
The sentence "you can take two cross-origin windows and make them same-origin" has to be the most alarming sounding thing that then turns out to not be such a huge deal.
I mean, it's not like it's not a big deal; it's in the process of being deprecated for a reason! But it's by no means the huge security vulnerability it might seem when you first hear that out of context.
https://developer.mozilla.org/en-US/docs/Web/API/Document/domain