Cannot Start The Driver Service On Http Localhost Selenium Firefox C -

pkill -f geckodriver

foreach (var process in Process.GetProcessesByName("geckodriver")) process.Kill(); Force a specific, free port to avoid conflicts. pkill -f geckodriver foreach (var process in Process

var service = FirefoxDriverService.CreateDefaultService(@"C:\path\to\geckodriver"); service.Port = 12345; // Use any free port above 1024 var driver = new FirefoxDriver(service); | Firefox Version | GeckoDriver Version | |----------------|---------------------| | 115+ (ESR) | 0.33+ | | 120+ | 0.34+ | | 130+ | 0.35+ | GitHub mozilla/geckodriver 4

Introduction If you are automating Firefox using Selenium WebDriver in C# (or any .NET language), you have likely encountered the dreaded WebDriverException : "Cannot start the driver service on http://localhost..." This error stops your automation dead in its tracks. It means Selenium cannot communicate with the geckodriver (the bridge between your code and Firefox). using OpenQA

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.

service = FirefoxDriverService.CreateDefaultService(); service.LogPath = "geckodriver.log"; service.LogLevel = FirefoxDriverLogLevel.Trace; var driver = new FirefoxDriver(service); Check geckodriver.log – it will show port binding failures, binary issues, or profile problems. using OpenQA.Selenium.Firefox; class Program

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