Brief
Cross-Origin Isolation Scanner checks whether browser, server, or platform settings are doing their protective job.
Scanner scope
Reviews the public configuration signals behind this area: Read-only review of COOP, COEP, and CORP headers that help isolate your site from cross-origin leaks and opener abuse.
Why it matters
Most launch issues come from one loose setting. Clear configuration checks make hidden risk visible before customers do.
Common issues
Missing protective setting
Weak default left in place
Configuration drift between environments
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