title: How to handle desktop notification in multiple tabs
body: <p>I am trying desktop notification using Notification.<br>
  My code  </p>
  
  <pre><code>var notification = new Notification(title, {
    icon: 'logourl',
    body: 'notification',
    tag: "nftnId",
    renotify: true
  });
  </code></pre>
  
  <p>Case:
    My URL opened in two tabs, one of my URL tabs is active and the other one is inactive. In this case, desktop notification happens but I want to prevent this action</p>