Examine source code of Subscription Shield

{
  "manifest_version": 3,
  "name": "Subscription Shield",
  "version": "1.0",
  "description": "Scans checkout elements for sneaky recurring auto-billing traps.",
  "permissions": [
    "activeTab",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shield-app@signalflow.software",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  }
}