Site A (COOP/COEP variant by path)

You are on path: (loading)
This path determines COOP/COEP via _headers.

Site B base: (loading)
CORP variants tested: /c1 (same-origin), /c2 (same-site), /c3 (cross-origin), /c4 (no CORP header)

Popups require user interaction: click each popup button once. Then export.

Iframes (4 CORP variants)

Verified by postMessage from B’s frame.

Images (4 CORP variants)

c1 c2 c3 c4

Scripts (4 CORP variants)

Each script sets window.bScript_cN = true if executed.

Popups (4 CORP variants)

Results table (for export)

Variant Iframe Image Script Popup opener
c1(pending)(pending)(pending)(pending)
c2(pending)(pending)(pending)(pending)
c3(pending)(pending)(pending)(pending)
c4(pending)(pending)(pending)(pending)