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

Ensure Firefox is updated to the latest stable release. 3. Configure Firewall Exceptions

Right-click your project -> Manage NuGet Packages -> Update Selenium.WebDriver and Selenium.WebDriver.GeckoDriver . Ensure Firefox is updated to the latest stable release

To prevent this error in the future, always wrap your driver initialization in a try-catch block and ensure you call driver.Quit() in a finally block or a using statement. Ensure Firefox is updated to the latest stable release

The error is a common headache for C# developers using Selenium with Firefox. It typically means the GeckoDriver executable is unable to establish a local network connection to start its internal server. 🛠️ Root Causes Port Conflicts: Another process is using the default port. Loopback Issues: localhost isn't resolving to 127.0.0.1 . Ensure Firefox is updated to the latest stable release