Running feature specs with Capybara and Chrome headless(drivy.engineering)

            var client = new WebClient();
            client.Headers[HttpRequestHeader.Cookie] = cookieString(driver);
            client.DownloadFile(reportURL, savePath + fileName + ".xlsx");

            string cookieString(IWebDriver driver)
            {
                var cookies = driver.Manage().Cookies.AllCookies;
                return string.Join("; ", cookies.Select(c => string.Format("{0}={1}", c.Name, c.Value)));

            }