Examine source code of Copy URL Override

{
  "manifest_version": 3,
  "name": "Copy URL Override",
  "version": "1.0",
  "description": "Overrides Cmd+Shift+C to copy the current tab URL instead of opening DevTools.",
  "permissions": [
    "clipboardWrite",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "commands": {
    "copy-url": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "MacCtrl+Shift+C"
      },
      "description": "Copy current tab URL to clipboard"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "better-firefox@iamrega.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}