Cross-Origin-Opener-Policy (COOP) header - HTTP | MDNThe HTTP Cross-Origin-Opener-Policy (COOP) response header allows a website to control whether a new top-level document, opened using Window.open() or by navigating to a new page, is opened in the same browsing context group (BCG) or in a new browsing context group.https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Cross-Origin-Opener-Policy
