How to Run Firefox in Headless Mode with Selenium and Python?

Troubleshooting Firefox Headless Mode in Selenium with Python

Despite using Selenium and FirefoxBinary with command-line arguments, you may still encounter Firefox running in its "head" version. To resolve this issue and successfully invoke Firefox headless, follow these steps:

Using Selenium Options() Class

In your Python script, you can set the headless property in the Options() class as shown below:

from selenium import webdriver
from selenium.webdriver.firefox.options import Options

options = Options()
options.headless = True
driver = webdriver.Firefox(options=options, executable_path=r'C:\Utility\BrowserDrivers\geckodriver.exe')

Environment Variable

Alternatively, you can set the environment variable MOZ_HEADLESS to any non-zero value to run Firefox headless:

$ MOZ_HEADLESS=1 python manage.py test

To enable/disable headless mode on the fly without modifying code, you can export the variable as follows:

$ export MOZ_HEADLESS=1
$ python manage.py test …
$ unset MOZ_HEADLESS

Additional Resources

• Video Tutorial: Mozilla Firefox in Headless Mode through Selenium 3.5.2 (Java)
• Article: Login into Gmail Account using Headless Chrome through Selenium Java

Related Question

How to configure ChromeDriver to initiate Chrome browser in headless mode through Selenium?

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