manifest.json

{
    "short_name": "Chat",
    "name": "Chat: Message unknown numbers on WhatsApp",
    "icons": [
      {
        "src": "images/icons/192x192.png",
        "type": "image/png",
        "sizes": "512x512"
      },
      {
        "src": "images/icons/512x512.png",
        "type": "image/png",
        "sizes": "512x512"
      }
    ],
    "id": "/?source=pwa",
    "start_url": "/?source=pwa",
    "background_color": "#1e1e1e",
    "display": "standalone",
    "scope": "/",
    "theme_color": "#075E54",
    "description": "Message numbers on WhatsApp without saving numbers to your contacts",
    "screenshots": [
      {
        "src": "images/screenshots/wide.webp",
        "type": "image/webp",
        "sizes": "1354x663",
        "form_factor": "wide"
      },
      {
        "src": "images/screenshots/mobile.webp",
        "type": "image/webp",
        "sizes": "412x915",
        "form_factor": "narrow"
      }
    ]
  }