title: Run firefox in background from C#
body: <p>I run Firefox (default browser) from  C# with the code:</p>
  
  <pre><code>System.Diagnostics.Process.Start(browser.Document.Url.ToString());
  </code></pre>
  
  <p>I want Firefox to run in the background, because every time is open a new tab, the Windows is focusing on the Firefox, and is annoying.</p>
  
  <p>How can I control Firefox tabs, close them after a time ?</p>