[
    "icons": [
      { "src": "favicons/180.png", "type": "image/png", "sizes": "180x180" },
      { "src": "favicons/192.png", "type": "image/png", "sizes": "192x192" },
      { "src": "favicons/512.png", "type": "image/png", "sizes": "512x512" }
    ]
]