Examine source code of Handle External Links

{
  "manifest_version": 3,
  "name": "Handle External Links",
  "version": "2.0",
  "description": "Handles external links with alert and copy option.",
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Handle External Links"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "handle-external-links@addons.mozilla.org",
      "strict_min_version": "110.0"
    }
  }
}