Examine source code of WhatsAssist

{
  "manifest_version": 3,
  "name": "WhatsAssist",
  "version": "1.0.0",
  "description": "AI tools inside WhatsApp Web composer and messages.",
  "permissions": [
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://web.whatsapp.com/*",
    "https://whatsofy.vercel.app/*"
  ],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "WhatsAssist",
    "default_popup": "index.html",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js"
      ],
      "matches": [
        "https://web.whatsapp.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "whatsassist@wakassharif.com",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "personalCommunications",
          "websiteContent"
        ]
      }
    }
  }
}