Examine source code of Auto Reload Page

{
  "name": "Auto Reload Page",
  "description": "Automatically reload web pages after a specified delay.",
  "version": "2.0.0",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_title": "Auto Reload Page",
    "default_popup": "popup.html",
    "default_icon": "icons/icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f96c0cda-68a4-4097-a5f5-de8baa70b6db}"
    }
  }
}