Open Task Manager and end all geckodriver.exe tasks.
Temporarily disable your local firewall/antivirus to verify if it resolves the issue. Open Task Manager and end all geckodriver
driver.get("http://google.com") print(driver.title) driver.quit() and localhost ports
Let’s fix it.
But beware of port conflicts. It's recommended to omit the port parameter and let Selenium pick a free ephemeral port. you can systematically eliminate the causes.
The error is almost never a Selenium bug—it is a local environment misconfiguration. By understanding the roles of GeckoDriver, Firefox, and localhost ports, you can systematically eliminate the causes.