Examine source code of My Spotlight

{
  "manifest_version": 2,
  "name": "My Spotlight",
  "icons": {
    "48": "/img/icons/icon-48x48.png",
    "192": "/img/icons/icon-192x192.png",
    "512": "/img/icons/icon-512x512.png"
  },
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "geolocation"
  ],
  "version": "3.2.6",
  "description": "Your own simple start page, strongly inspired by Windows Spotlight. 💡 PROJECT IDEA: A public project developed by the community.",
  "homepage_url": "https://github.com/PlayXman/app-my-spotlight#readme",
  "browser_specific_settings": {
    "gecko": {
      "id": "{343a6d67-8fdb-42aa-bb81-53502a63cbc6}"
    }
  }
}