Cannot Start The Driver Service On Http Localhost Selenium Firefox C May 2026

// No need to set driver path anymore var driver = new FirefoxDriver(); // Selenium Manager handles geckodriver Update your NuGet packages to Selenium.WebDriver 4.6 or higher. Let me know in the comments which fix worked for you, or share your geckodriver.log for more help!

GitHub mozilla/geckodriver 4. Add Driver Path to System PATH (or specify explicitly) Option A – Add to PATH: Place geckodriver.exe in a folder already on PATH, or add its folder to system environment variables. // No need to set driver path anymore

var driver = new FirefoxDriver(options); // will search PATH driver.Navigate().GoToUrl("https://example.com"); Console.WriteLine(driver.Title); driver.Quit(); taskkill /F /IM geckodriver.exe

taskkill /F /IM geckodriver.exe