Examine source code of Apk Coverter

{
  "manifest_version": 2,
  "name": "Apk Coverter",
  "description": "A shortcut app generated via Applicationize.",
  "version": "1.1resigned1",
  "icons": {
    "128": "img/icon.png"
  },
  "app": {
    "background": {
      "scripts": [
        "js/background.js"
      ],
      "pages": [
        "html/embed.html"
      ]
    }
  },
  "permissions": [
    "webview",
    "fullscreen",
    "notifications",
    "videoCapture"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0fb8b8b-c793-44cb-a470-0755c4e8a253}"
    }
  }
}