Examine source code of Copy Title or Url

{
  "manifest_version": 3,
  "name": "Copy Title or Url",
  "version": "1.7",
  "description": "For copying title or url.",
  "icons": {
    "64": "icon.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "clipboardWrite",
    "tabs"
  ],
  "action": {
    "default_title": "Copy Title or Url",
    "default_popup": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2c250d4a-58ee-46ca-afb7-c740dbd74331}"
    }
  }
}