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

// 3. Pass the service to the driver constructor IWebDriver driver = new FirefoxDriver(service);

Update Firefox to the latest version and download the corresponding GeckoDriver releases from GitHub .

: Verify your system's hosts file (located in C:\Windows\System32\drivers\etc ) has the line 127.0.0.1 localhost active (not commented out). Full Troubleshooting Report Issue Category Common Root Causes Recommended Action Process Conflicts Too many background driver instances are already running.