title: Firefox webdriver opens first run page all the time
body: <p>How to disable this "first run" page once and for all for FF?</p>
  
  <p>When FF driver is created, it opens tab with -
  <a href="https://www.mozilla.org/en-US/firefox/42.0/firstrun/learnmore/" rel="noreferrer">https://www.mozilla.org/en-US/firefox/42.0/firstrun/learnmore/</a>
  and additional tab with target page.</p>