Here are a few question-based titles that fit the provided information: Short & Punchy: * Why Am I Getting \"Invalid Argument: Can\'t Kill an Exited Process\" with Selenium on my Raspb

WebDriverException: Invalid Argument: Can't Kill an Exited Process with GeckoDriver, Selenium, and Python on RaspberryPi3

Question:

Users are encountering a WebDriverException error while attempting to run Selenium with headless Firefox on a Raspberry Pi 3. The specific error message is: "Message: invalid argument: can't kill an exited process."

Background Information:

• Server: Raspberry Pi 3
• OS: Dietpi version 159
• Geckodriver version: 0.22 for arm
• Firefox version: 52.9.0
• Python version: 3.5
• Selenium version: 3.14.1

Code Snippet:

<code class="python">from selenium import webdriver
from selenium.webdriver.firefox.options import Options

options = Options()
options.headless = True
driver = webdriver.Firefox(options=options)</code>

Answer:

To resolve this issue, ensure that you are using headless mode when running Firefox on a system without a display.

Solution:

1. Add the following code to your script:

<code class="python">options.headless = True</code>

2. Verify that you have compatible versions of Firefox, Selenium, and Geckodriver. Refer to the following documentation for support: https://firefox-source-docs.mozilla.org/testing/geckodriver/Support.html

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