chrome.webRequest.onBeforeSendHeaders.addListener failed to insert X-Timestamp into requestHeaders.

[Zh Meng]

From the log captured via Wireshark, we found that there was no X-Timestamp in the requests sent at the very begining while  X-Timestamp were found in other requests sent later, it happens only when re-open the browser. Could you please help clarify why there is no X-Timestamp in the requests sent at the very begining or is there any solution to add X-Timestamp in all the requests including the requests sent when openning the browser (without X-Timestamp)?

Code：

function modifyRequestHeaderHandler_(details) { 

  details.requestHeaders.push({name: "X-Timestamp", value: "xxxx-xx-xxxx"});

  return {requestHeaders: details.requestHeaders};

};

//add a listener onberforesendherders

chrome.webRequest.onBeforeSendHeaders.addListener(

  modifyRequestHeaderHandler_,

  {urls: []},

  ['requestHeaders', 'blocking']

);