title: headless mode on firefox in selenium webdriver does not respond
body: <p>guys I am trying to open a cite in headless mode in firefox, I have a very simple code but it does not work, when I press run it just shows me nothing.
  My code is:</p>
  <pre><code>from selenium import webdriver
  from selenium.webdriver.firefox.options import Options
  
  web = &quot;https://www.powerplay.com/sportsbook/SOCCER/&quot;
  firefox_options = Options()
  firefox_options.headless = True
  
  driver = webdriver.Firefox(options=firefox_options)
  driver.get(web)
  </code></pre>
  <p>Here's the respond that I get:
  <a href="https://i.stack.imgur.com/NzUOD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NzUOD.png" alt="enter image description here" /></a></p>