Examine source code of Afresto Automator

{
  "manifest_version": 3,
  "name": "Afresto Automator",
  "version": "2.1.0",
  "description": "Otomatisasi pembuatan evaluasi dan materi di AFRESTO LMS",
  "browser_specific_settings": {
    "gecko": {
      "id": "afresto-automator@extension",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "tabs",
    "sidebarAction"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; img-src 'self' data: https:; connect-src 'self' https://*.google.com https://*.googleapis.com https://docs.google.com https://*.googleusercontent.com https://*.afresto.id;"
  },
  "host_permissions": [
    "https://*.afresto.id/*",
    "https://*.google.com/*",
    "https://*.googleapis.com/*",
    "https://*.googleusercontent.com/*"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_popup": "popup.html"
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Afresto Automator"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.afresto.id/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}