Cannot Start The Driver Service On Http Localhost Selenium Firefox C 💯 Editor's Choice

from selenium.webdriver.firefox.service import Service service = Service(executable_path='path/to/geckodriver', port=7055) # Classic Selenium port driver = webdriver.Firefox(service=service)

Using port=7055 often resolves conflicts because it's a reserved port for WebDriver. On Windows, SmartScreen or Windows Defender may quarantine or silently block geckodriver.exe because it opens a network port (behavior associated with malware). 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) from selenium

If you are reading this, you have likely been staring at a red, intimidating stack trace in your console. The error message, often truncated as cannot start the driver service on http://localhost when using Selenium with Firefox, is a classic automation roadblock. from selenium

import io.github.bonigarcia.wdm.WebDriverManager; WebDriverManager.firefoxdriver().setup(); // Auto-downloads and sets path WebDriver driver = new FirefoxDriver();