Examine source code of WhatsApp Sidebar Minimizer

{
  "manifest_version": 3,
  "name": "WhatsApp Sidebar Minimizer",
  "version": "1.0.5",
  "author": "Nyihui",
  "description": "An extension that simply hides the WhatsApp Web sidebar. Toggle with a button click or (Alt + .) keyboard shortcut.",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "whatsapp-sidebar-minimizer@extension",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "512": "icon/minimize.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icon/minimize.png",
        "icon/expand.png"
      ],
      "matches": [
        "https://web.whatsapp.com/*"
      ]
    }
  ]
}