Examine source code of WhatsApp Sidebar

{
  "manifest_version": 3,
  "name": "WhatsApp Sidebar",
  "version": "1.0.6",
  "description": "Abre WhatsApp Web en la barra lateral de Firefox.",
  "browser_specific_settings": {
    "gecko": {
      "id": "wasap-extension-firefgo@ayarachi.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_title": "WhatsApp",
    "default_panel": "sidebar/sidebar.html",
    "default_icon": "icons/WhatsApp.svg"
  },
  "icons": {
    "48": "icons/WhatsApp.svg",
    "96": "icons/WhatsApp.svg"
  },
  "action": {
    "default_icon": "icons/WhatsApp.svg",
    "default_title": "Abrir WhatsApp"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  },
  "permissions": [
    "menus",
    "storage",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "notifications"
  ],
  "host_permissions": [
    "*://*.whatsapp.com/*",
    "*://*.whatsapp.net/*",
    "*://*.facebook.com/*",
    "*://*.fbcdn.net/*",
    "<all_urls>"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "rules",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://web.whatsapp.com/*"
      ],
      "css": [
        "content/style.css"
      ],
      "js": [
        "content/state.js",
        "content/dom.js",
        "content/resizer.js",
        "content/miniChats.js",
        "content/scanner.js",
        "content/quickReply.js",
        "content/content.js"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ]
}