Examine source code of Window Reloader

{
  "manifest_version": 2,
  "name": "Window Reloader",
  "version": "1.0.0",
  "description": "Browser Extension for reloading window on interval",
  "icons": {
    "16": "/icons/icon-16.png",
    "32": "/icons/icon-32.png",
    "48": "/icons/icon-48.png",
    "256": "/icons/icon-256.png",
    "512": "/icons/icon-512.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "script.js"
  ],
  "browser_action": {
    "default_icon": "/icons/icon-32.png",
    "default_title": "Window Reloader - Options",
    "default_popup": "popup/index.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ab8016e1-6462-42b5-991c-5a04ab1dc8df}"
    }
  }
}