Examine source code of Copy Cat

{
  "manifest_version": 3,
  "name": "copy-cat",
  "version": "0.2.6",
  "description": "Record clicks, hovers, keystrokes, and delays, then replay them on the current site.",
  "browser_specific_settings": {
    "gecko": {
      "id": "copy-cat@local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "copy-cat",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "48": "icons/icon.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ]
}