Examine source code of Copy current URL shortcut

{
  "manifest_version": 3,
  "name": "Copy current URL shortcut",
  "version": "1.0",
  "description": "Copies the current URL to clipboard using a defined shortcut.",
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@ff.cc",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_title": "Copy current URL shortcut"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "copy-url-command": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "Ctrl+MacCtrl+C"
      },
      "description": "Copy current URL using keyboard shortcut."
    }
  }
}