static void Main(string[] args)

{

            string file = @"C:\Users\Hero\Desktop\SiteWhitelist.tsv";

            string[] lines = System.IO.File.ReadAllLines(file);

            foreach (var url in lines)

            {

                var startInfo = new ProcessStartInfo("firefox.exe", url);

                Process.Start(startInfo);

                string getUrl = GetBrowserURL("FireFox");

                Thread.Sleep();

                File.WriteAllText(@"C:\Users\Hero\Desktop\SaveSiteWhitelist.txt",

                    getUrl + Environment.NewLine + File.ReadAllTex    (@"C:\Users\Hero\Desktop\SaveSiteWhitelist.txt"));

            }

            Console.ReadKey();

}

public static string GetBrowserURL(string browser)

{

        try

        {

                DdeClient dde = new DdeClient(browser, "WWW_GetWindowInfo");

                dde.Connect();

                string url = dde.Request("URL", int.MaxValue);

                string[] text = url.Split(new string[] { "\",\"" }, StringSplitOptions.RemoveEmptyEntries);

                dde.Disconnect();

                return text[].Substring();

          }

            catch

            {

                return null;

            }

}