manifest.json

{
    "short_name": "Dialogflow",
    "name": "Dialogflow Progressive WebApp",
    "icons": [
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "48x48"
      },
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "72x72"
      },
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "96x96"
      },
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "144x144"
      },
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "192x192"
      },
      {
        "src": "https://console.dialogflow.com/api-client/assets/img/logo-short.png",
        "type": "image/png",
        "sizes": "512x512"
      }
    ],
    "permissions": {
      "audio-capture" : {
        "description" : "Audio capture"
      },
      "speech-recognition" : {
        "description" : "Speech recognition"
      }
    },
    "type": "privileged",
    "start_url": "index.html",
    "background_color": "#FFFFFF",
    "theme_color": "#FF9800",
    "dir": "ltr",
    "display": "standalone",
    "orientation": "any",
    "lang": "en"
}