let hasCookieHeader = false;
  if (d.headers) {
    for (let prop in d.headers) {
      if (Object.prototype.hasOwnProperty.call(d.headers, prop)) {
        let propLower = prop.toLowerCase();
-        hasCookieHeader = (propLower === 'cookie');
+       hasCookieHeader ||= (propLower === 'cookie');
        if (gHeadersToReplace.includes(propLower)) {
          xhr.setRequestHeader(gDummyHeaderPrefix + propLower, d.headers[prop]);
        }
        else {
          xhr.setRequestHeader(prop, d.headers[prop]);
        }
      }
    }
  }