Cannot Start The Driver Service On Http Localhost Selenium Firefox C [extra Quality] «2026 Release»

c# - 'Cannot start the driver service on http://localhost:60681/'

from selenium import webdriver from selenium.webdriver.firefox.service import Service

If Firefox is installed in a non-standard directory, GeckoDriver won't be able to find it to start the service. You can explicitly tell Selenium where your browser executable lives using FirefoxOptions . c# - 'Cannot start the driver service on

from selenium.webdriver.firefox.service import Service

What and Firefox are you currently running? c# - 'Cannot start the driver service on

Security software or windows firewall configurations can block the internal HTTP traffic between your C# test script and geckodriver.exe .

Force GeckoDriver to listen on the IPv4 loopback specifically: c# - 'Cannot start the driver service on

(This often mistakenly points to the browser instead of the driver). FirefoxDriverService to explicitly define the executable location: