title: Prevent window.open from focusing
body: <p>I want to open a page in a new tab in Google Chrome with window.open(), but I don't want that window to gain focus after it's opened, but to stay in the background.</p>
  
  <p>Is this possible? It only has to work on Google Chrome. It can also use the Google Chrome extension API.</p>
  
  <p>Thanks</p>