Cannot Start The Driver Service On Http Localhost Selenium Firefox C 2021

This error is rarely a "bug" in your code logic; it is almost always an .

When you run a Selenium script for Firefox, Selenium tries to start geckodriver (the bridge between your code and Firefox). geckodriver runs an HTTP server on http://localhost:someport . If that server fails to start — Selenium throws the error you see. This error is rarely a "bug" in your

blocking temporary executables.

Running the driver from a restricted folder (like Program Files ) without admin privileges can prevent the service from starting. 2. Troubleshooting & Resolution Steps This error is rarely a "bug" in your