{
  "name": "Package Tracker",
  "shortname": "Tracker",
  "start_url": "/",
  "display": "standalone",
  "theme_color": "#f7b551",
  "background_color": "#ffffff",
  "icons": [
    {
      "src": "<%= asset_path 'launcher-icon-2x.png' %>",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "<%= asset_path 'launcher-icon-3x.png' %>",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "<%= asset_path 'launcher-icon-4x.png' %>",
      "sizes": "192x192",
      "type": "image/png"
    }
  ]
}

{
  "name": "Package Tracker",
  "shortname": "Tracker",
  "start_url": "/",
  "display": "browser",
  "theme_color": "#f7b551",
  "background_color": "#ffffff",
  "icons": [
    {
      "src": "<%= asset_path 'launcher-icon-2x.png' %>",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "<%= asset_path 'launcher-icon-3x.png' %>",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "<%= asset_path 'launcher-icon-4x.png' %>",
      "sizes": "192x192",
      "type": "image/png"
    }
  ]
}

Change manifest display to browser
Change manifest display to browser
