Examine source code of WhatsApp Web Privacy

{
  "manifest_version": 3,
  "name": "WhatsApp Web Privacy Blur",
  "version": "1.0",
  "description": "Ofusca chats e prévias de mensagens no WhatsApp Web, revelando ao passar o mouse.",
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "wa-privacy-blur@seuemail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "WB Privacy"
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}