Examine source code of Fases Lunares

{
  "manifest_version": 2,
  "name": "Fases Lunares",
  "version": "2.2.5",
  "description": "Muestra la fase lunar en el icono de la barra y más datos si clikas.",
  "author": "Iñaki",
  "background": {
    "scripts": [
      "jquery-3.5.1.js",
      "moon2021.json",
      "contentFases.js"
    ]
  },
  "content_security_policy": "script-src 'self' https://weather.cit.api.here.com; object-src 'self'",
  "permissions": [
    "geolocation"
  ],
  "icons": {
    "16": "iconos/icon16.png",
    "48": "iconos/icon48.png",
    "128": "iconos/icon128.png"
  },
  "browser_action": {
    "default_popup": "fases.html",
    "default_title": "Fases",
    "default_icon": "icon.png"
  }
}