title: Display: fullscreen doesn't work on manifest json
body: <p>I want my progressive web app to appear fullscreen without the chrome address/toolbar shown up on top when I add it to homescreen. Therefor I added display:fullscreen on manifest.json but it doesn't work. Here is my manifest.json code:</p>
  
  <pre><code>{
    "name": "Cardiofit",
    "short_name": "Cardiofit",
    "description": "Modern app for your health",
    "icons": [
      {
        "src": "images/cardio192.png",
        "sizes": "192x192",
        "type": "image/png"
      },
      {
        "src": "images/cardio512.png",
        "sizes": "512x512",
        "type": "image/png"
      }
    ],
    "display": "fullscreen",
    "start_url": "/",
    "orientation": "portrait"
  }
  </code></pre>
  
  <p>I connected my smartphone with usb cable to my computer and opened chrome on my computer. Then navigated to "remote devices" in chrome inspector so I could surf to localhost on my android to see how the app would look like when it's added to homescreen. But I can stil see the browser address-toolbar on top of it even after declaring "display: fullscreen" on manifest.json.</p>
  
  <p>How can I fix this?</p>