Start Trying different ways to access a password protected resource from another origin. The UA already has login and password for this protection space. You should see several PASS messages followed by a DONE SCRIPT SRC='...' Should succeed, since authorization is sent for cross-origin subresource loads. PASS: Loaded, user test Cross-origin XMLHttpRequest (sync), testing stored authorization. PASS Cross-origin XMLHttpRequest (sync), testing cookies. PASS Cross-origin XMLHttpRequest (async), testing stored authorization. PASS Cross-origin XMLHttpRequest (async), testing cookies. PASS Cross-origin XMLHttpRequest (sync), testing authorization with explicitly provided credentials that should be ignored. PASS Cross-origin XMLHttpRequest (async), testing authorization with explicitly provided credentials that should be ignored. PASS DONE