title: getUserMedia in PWA with manifest on iOS 11
body: <p>I have created a PWA which uses WebRTC's getUserMedia to get a live camera stream. The PWA uses a manifest.json, and works great on Android.</p>
  
  <p>On iOS however, the app also works if I open the link directly in Mobile Safari, but if I add it to the homescreen, it is undefined (as iOS only allows it in the Safari-context).</p>
  
  <p>As a workaround, I would like to open the app in Mobile Safari instead of fullscreen mode, but I don't know how to do this, as it automatically opens fulscreen once it detects the manifest.json.</p>
  
  <p>Does anyone have an idea as how to open an app with a manifest in Safari?</p>
  
  <p>Thank you!</p>