title: Modifying the timeout of notifications in a firefox extension
body: <p>I am using the notification function of the firefox SDK to create a firefox extensions. the problem is that after showing the notification it fades away too quickly , is there a way to modify the timeout of the notification ? this is the code i'm using : </p>
  
  <pre><code>notifications.notify({
                        title: "notification title",
                        text: " notification text ",
                        data: List[i] ,
                        onClick: function (data) {
                          tabs.open(data);
  
                        }
              });
  </code></pre>