title: Installed web app shows different version than in browser
body: <p>When I load matchflix.ch on my phone, the installed app shows a different version than when I open the site in the phone browser. How can this be?</p>
  <h3>Details</h3>
  <p>I know that a service worker is in place for offline mode / caching. However, the web app should behave the same in the browser and in the installed web app, since in the service worker I only listen to the fetch event and do nothing on the install event.</p>
  <h3>Reproduction</h3>
  <p>You can check the difference by showing infos of a movie and then click on the yellow play icon. In the new version, it should show something below, while in the old version, a new website opens.</p>