title: How to clear a Service Worker cache in Firefox?
body: <p>In Chrome it is possible to clear the Service Worker cache from the Dev Tools.</p>
  
  <p>How can we achieve that in Firefox?</p>
  
  <p>I've tried so far:</p>
  
  <ul>
  <li>to unregister the service in <code>about:serviceworkers</code></li>
  <li>to empty the cache under <code>about:preferences#privacy</code> </li>
  <li>to reload the page with <code>Ctrl + F5</code></li>
  </ul>
  
  <p>but it's still there...</p>