title: Running Service workers continuosly in background?
body: <p>I have been learning about Service workers today only. I have a couple of questions </p>
  
  <p>1) what are the limiation of using service workers other than the https? I read that the lifetime of the service worker is limited, is it possible for me to keep the service worker running in the background as long as the browser (not my page) is opened? if possible, what could be the issue?</p>
  
  <p>2) When a event is running using service workers, by mistake i close the tab, when i open my page, is it possible for me to check what are the pending events that are running in my service worker? If possible could you give me a short example?</p>
  
  <p>3) Is there a limitation on how many pages to be cached? What can be cached and what shouldn't?</p>
  
  <p>Thanks,
  <br/>Jollyguy</p>