CONSOLE MESSAGE: The page at https://127.0.0.1:8443/security/mixedContent/insecure-basic-auth-image-allowCrossOriginSubresourcesToAskForCredentials.https.html was allowed to display insecure content from http://localhost:8000/security/mixedContent/resources/subresource2/protected-image.py. http://localhost:8000/security/mixedContent/resources/subresource2/protected-image.py - didReceiveAuthenticationChallenge - Responding with testUser:testPassword Tests that we do not ask for credentials when loading an insecure image that requires basic authentication. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS did load image. PASS successfullyParsed is true TEST COMPLETE