Explain
COOP (Cross-Origin-Opener-Policy)
Controls whether your top-level page shares a browsing context group with cross-origin documents (security/isolation).
InfoCategory: headers
What it is
COOP helps isolate your page from cross-origin windows/tabs to reduce cross-origin attacks and enable stronger isolation.
Common values
- same-origin (strict)
- same-origin-allow-popups (less strict)
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