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

For Java:

from selenium.webdriver.firefox.options import Options options = Options() options.binary_location = r'C:\Program Files\Mozilla Firefox\firefox.exe' # Windows driver = webdriver.Firefox(options=options) Cause 5: The Headless/Background Mode Trap When running Selenium on a headless server (Linux without a GUI, or Docker container), GeckoDriver attempts to create a graphical display. If it fails, the entire service crashes with the localhost error. For Java: from selenium

The error occurs only in CI/CD (Jenkins, GitLab CI) but works on your local desktop. or Docker container)

This error is Selenium’s way of saying: “I tried to launch Firefox, but the bridge (GeckoDriver) connecting me to the browser collapsed before the connection could be established.” For Java: from selenium

from selenium import webdriver from selenium.webdriver.firefox.service import Service service = Service(executable_path=r'C:\drivers\geckodriver.exe') driver = webdriver.Firefox(service=service)