Examine source code of Screen Privacy Guard for WhatsApp Web

{
  "manifest_version": 3,
  "name": "Screen Privacy Guard for WhatsApp Web",
  "version": "0.2.0",
  "description": "A local-only privacy add-on that blurs sensitive WhatsApp Web content during screen sharing and public browsing in Firefox.",
  "browser_specific_settings": {
    "gecko": {
      "id": "screen-privacy-guard-for-whatsapp-web@example.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "121.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://web.whatsapp.com/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "type": "classic"
  },
  "action": {
    "default_title": "Screen Privacy Guard",
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "commands": {
    "toggle-privacy-mode": {
      "suggested_key": {
        "default": "Alt+X",
        "mac": "Alt+X"
      },
      "description": "Toggle Privacy Mode"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "js": [
        "src/content.js"
      ],
      "css": [
        "src/styles.css"
      ],
      "run_at": "document_idle"
    }
  ]
}