Examine source code of Auto Refresher Pro

{
  "manifest_version": 3,
  "name": "Auto Refresher Pro",
  "version": "1.0",
  "default_locale": "en",
  "description": "Automatically refresh web pages at set intervals with smart detection features.",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "scripting",
    "activeTab",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*",
        "sounds/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-refresher-pro@techbitan.eu",
      "strict_min_version": "121.0"
    }
  }
}