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HTML rel Security Review Guide

Review noopener, noreferrer and window.opener boundaries with synthetic cases. No link navigation is performed.

rel and target boundaries

Review opener protection for external links separately from adjacent link behavior.

CaseResultWhat to check
Choose a case to display it.

Why real links are not used

No link navigation, window.opener access, external request, storage, analytics or upload is performed.

A synthetic result does not guarantee browser navigation behavior. Verify generated HTML and target browsers separately.