Examine source code of App Shortcut Launcher

{
  "manifest_version": 2,
  "name": "App Shortcut Launcher",
  "description": "App Shortcut Launcher is a quick-access extension generated via Applicationize, allowing you to launch web apps directly from your browser with a single click.",
  "version": "1.0",
  "icons": {
    "128": "img/icon.png"
  },
  "app": {
    "background": {
      "scripts": [
        "js/background.js"
      ],
      "pages": [
        "html/embed.html"
      ]
    }
  },
  "permissions": [
    "webview",
    "fullscreen"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b0efc126-2bd6-4c23-95e2-dfc7a60dbe36}"
    }
  }
}