title: Selenium WebDriverException
body: <p>I have a WebDriverException using webdriver from selenium </p>
  
  <pre><code>[]# python3.4 file.py
  Traceback (most recent call last):
    File "file.py", line 195, in &lt;module&gt;
      browser = webdriver.Firefox()
    File "/usr/lib/python3.4/site-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
      keep_alive=True)
    File "/usr/lib/python3.4/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
      self.start_session(capabilities, browser_profile)
    File "/usr/lib/python3.4/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
       response = self.execute(Command.NEW_SESSION, parameters)
    File "/usr/lib/python3.4/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
      self.error_handler.check_response(response)
    File "/usr/lib/python3.4/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
      raise exception_class(message, screen, stacktrace)
  selenium.common.exceptions.WebDriverException: Message: invalid argument: can't kill an exited process
  </code></pre>
  
  <p>I read that this exception could be caused by version issues between the different modules. But does not seem to be the problem here.</p>
  
  <p>Selnium version: 3.141</p>
  
  <p>Geckodriver version: 0.26</p>
  
  <p>Firfox version: 68.5.0esr</p>
  
  <p>Python: 3.4</p>
  
  <p>Do you have any idea ?</p>
  
  <p>src:</p>
  
  <pre><code>from selenium import webdriver
  browser = webdriver.Firefox()
  ...
  </code></pre>