Examine source code of Auto Refresh Page

{
  "manifest_version": 2,
  "name": "Auto Refresh Page",
  "version": "1.0",
  "description": "Automatically refreshes the current page at a specified interval.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Auto Refresh Page"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f8b2c71-9a64-4e35-b0d8-7c1f52a946ed}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}