Alternatively, if you are strictly in a C# environment, you can programmatically kill lingering processes before your test suite initializes:
GeckoDriver and Firefox have a strict compatibility matrix. A very new Firefox version with an old GeckoDriver (or vice versa) will cause the service to fail.
service = Service(executable_path=gecko_path) Alternatively, if you are strictly in a C#
Because C# interacts directly with system processes to spawn these browser drivers, configuration or permission slip-ups immediately cause this initialization failure. Below is a detailed, structured guide to diagnosing and permanently resolving this error, ranging from executable mismatches to environmental blockers. 1. Locate and Update the GeckoDriver Executable
Selenium attempts to locate geckodriver in your system’s PATH environment variable or at a path you specified. If it fails, it cannot start the service. Below is a detailed, structured guide to diagnosing
Right-click your project in Visual Studio and select .
Selenium drivers are architecture-specific. If you are running a 64-bit version of Firefox but using a 32-bit version of geckodriver (or vice versa), you might run into initialization failures. If it fails, it cannot start the service
Console.WriteLine("Driver exe not found: " + e.Message);
