public void StartBrowser(Dictionary <string, string> additionalCapabilities = null)
 {
     if (Browser == null)
     {
         _settings.AdditionalRemoteDriverCapabilities = additionalCapabilities;
         var driverCreator = new DriverCreator(_settings);
         Browser = new Browser(driverCreator.CreateDriverForBrowser(), _settings);
     }
     else
     {
         throw new Exception("Only one browser allowed per test thread");
     }
 }