Examine source code of Copy Page Info

{
  "manifest_version": 3,
  "name": "Copy Page Info",
  "version": "1.0",
  "description": "Copy the current page's title and URL to clipboard.",
  "permissions": [
    "tabs",
    "scripting",
    "clipboardWrite"
  ],
  "action": {
    "default_icon": "icon.png",
    "default_title": "Copy Title and URL"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "copy-page-info@example.com",
      "strict_min_version": "109.0"
    }
  }
}