!link! — Cannot Start The Driver Service On Http Localhost Selenium Firefox C

The error "Cannot start the driver service on http://localhost" in Selenium for C# typically occurs when the geckodriver.exe (or another driver executable) fails to launch or bind to a local port before a hard-coded timeout (often 2 seconds). Top Causes and Resolutions

Version Mismatch: Incompatibility between the Selenium library, GeckoDriver, and the installed version of Firefox. The error "Cannot start the driver service on

• Add driver folder to PATH or provide full path when creating service.

Permission Issues: Running the driver from a restricted folder (like Program Files) without admin privileges can prevent the service from starting. 2. Troubleshooting & Resolution Steps Add driver folder to PATH or provide full

🧪 Quick test script (Python)

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