| CONSOLE MESSAGE: Unsafe JavaScript attempt to initiate navigation for frame with URL 'http://127.0.0.1:8000/security/block-top-level-navigations-by-third-party-sandboxed-iframe.html' from frame with URL 'data:text/html;base64,PGh0bWw+PGJvZHk+U3VjY2VzcyEgVGhlIG5hdmlnYXRpb24gd2FzIGJsb2NrZWQ8c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+IHdpbmRvdy50b3AubG9jYXRpb24gPSAiaHR0cDovL2xvY2FsaG9zdDo4MDAwL3NlY3VyaXR5L3Jlc291cmNlcy9zaG91bGQtbm90LWhhdmUtbG9hZGVkLmh0bWwiOzwvc2NyaXB0PjwvYm9keT48L2h0bWw+'. The frame attempting navigation of the top-level window is cross-origin or untrusted and the user has never interacted with the frame. |
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| CONSOLE MESSAGE: SecurityError: The operation is insecure. |
| Test blocking of suspicious top-level navigations by a third-party iframe even if sandboxing rules allow top navigation |
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| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". |
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| PASS All navigations by subframes have been blocked |
| PASS successfullyParsed is true |
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| TEST COMPLETE |
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