title: Selenium: How to Inject/execute a Javascript in to a Page before loading/executing any other scripts of the page?
body: <p>I'm using selenium python webdriver in order to browse some pages. I want to  inject a javascript code in to a pages before any other Javascript codes get loaded and executed. On the other hand, I need my JS code to be executed as the first JS code of that page. Is there a way to do that by Selenium?</p>
  
  <p>I googled it for a couple of hours, but I couldn't find any proper answer! </p>