Cannot Start The Driver Service On Http Localhost Selenium Firefox C 〈100% LATEST〉

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).

sudo apt-get install xvfb xvfb-run python your_selenium_script.py Or, use PyVirtualDisplay in Python: Using port=7055 often resolves conflicts because it's a

from selenium.webdriver.firefox.service import Service service = Service( executable_path='geckodriver.exe', service_args=['--log', 'debug'] # Forces verbose output ) driver = webdriver.Firefox(service=service) This article will dissect every possible cause of

On Linux, install xvfb (X Virtual Framebuffer): Selenium does not control Firefox directly

Do not worry. This article will dissect every possible cause of this error—from version hell and path misconfigurations to operating system permissions and port conflicts. By the end, your Firefox automation will start cleanly, every time. Before fixing the problem, you must understand the players involved. Selenium does not control Firefox directly. It uses a separate executable called GeckoDriver . The communication flow looks like this: