------- Inspected URL: http://www.aljazeera.net/portal Loading completed: true Frontend User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13) AppleWebKit/604.1.16+ (KHTML, like Gecko) Dispatch Source: Protocol Command Response Protocol Command Response: {"result":{"nodeId":0},"id":724} Protocol Command Request: {"id":724,"method":"DOM.requestNode","params":{"objectId":"{\"injectedScriptId\":166,\"id\":2}"}} Uncaught Exceptions: - null is not an object (evaluating 'rootNode.id') (at DOMTree.js:119:72) ? @ DOMTree.js:119:72 dispatchCallbacks @ DOMTree.js:193:52 rootDOMNodeAvailable @ DOMTree.js:162:39 rootDOMNodeAvailable @ [native code] ? @ DOMTreeManager.js:108:21 _dispatchResponseToCallback @ Connection.js:146:27 _dispatchResponse @ Connection.js:116:45 dispatch @ Connection.js:69:35 dispatch @ InspectorBackend.js:154:49 dispatchNextQueuedMessageFromBackend @ MessageDispatcher.js:42:34 Additional Details: cause --> An uncaught exception was thrown while dispatching response callback for command DOM.requestNode. ------- This happens 100% of the time when inspecting the Arabic version of Al Jazeera. I think it is caused by their heavy use of frames for ads, etc.