chrome.webRequest.onBeforeSendHeaders.addListener(function callback(details){
  //console.log(JSON.stringify(details));
  var headers = details.requestHeaders,
  blockingResponse = {};
  var newRef = "https://www.reddit.com/r/koreanvariety/comments/723mtd/i_created_this_website_that_streams_korean_shows/";
  var hasRef = false;

  // Each header parameter is stored in an array. Since Chrome
  // makes no guarantee about the contents/order of this array,
  // you'll have to iterate through it to find for the
  // 'User-Agent' element
	  for( var i = 0, l = headers.length; i < l; ++i ) {

		if( headers[i].name == 'Referer' ) {
			//headers[i].value = newRef;
			hasRef = true;
			break;
		}
		// If you want to modify other headers, this is the place to
		// do it. Either remove the 'break;' statement and add in more
		// conditionals or use a 'switch' statement on 'headers[i].name'
	  }
		if (!hasRef) {
			headers.push({name:"Referer", value:newRef});
		}
 // }
  blockingResponse.requestHeaders = headers;
  return blockingResponse;
},
{urls: [ "https://goplay.anontpp.com/" ]},['requestHeaders','blocking']);