title: How do I keep a notification open in firefox?
body: <p>I have a chat program and I expect people to leave their desk.  When they come back, I would like notifications to still be on the screen.  Chrome can leave up notifications forever, but firefox auto closes.  This isn't great because users aren't going to be staring at their monitors</p>
  
  <p>Firefox seems to auto close notifications.  Is there a nice way to keep it open?</p>