Examine source code of privacy-shield-for-whatsappweb

{
  "manifest_version": 3,
  "name": "WhatsApp Privacy Shield",
  "description": "Protect privacy on WhatsApp Web by hiding chats, messages, and media until explicitly revealed.",
  "version": "1.0.0",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://web.whatsapp.com/*"
  ],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "WhatsApp Privacy Shield",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icon.png"
      ],
      "matches": [
        "https://web.whatsapp.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "whatsapp-privacy-shield@primordic.local",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}