Examine source code of CookieNuke

{
  "manifest_version": 3,
  "name": "CookieNuke",
  "version": "2.4",
  "description": "Multi-site cookie import support + Open in Tab",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/cookies-nuke-16.png",
      "48": "icons/cookies-nuke-48.png",
      "128": "icons/cookies-nuke-128.png"
    }
  },
  "icons": {
    "16": "icons/cookies-nuke-16.png",
    "48": "icons/cookies-nuke-48.png",
    "128": "icons/cookies-nuke-128.png"
  },
  "permissions": [
    "cookies",
    "browsingData",
    "tabs",
    "activeTab",
    "downloads",
    "clipboardWrite",
    "storage"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cookienuke@example.com"
    }
  }
}