Examine source code of Simple Cursor Customizer

{
  "manifest_version": 2,
  "name": "Simple Cursor Customizer",
  "version": "1.0",
  "description": "Customize your browser cursor with a stylish image.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Cursor Customizer"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "popup.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{70dacc4b-7399-4b35-8af8-f23d35b37894}"
    }
  }
}