Examine source code of Defenras — Family Browser Protection

{
  "manifest_version": 3,
  "name": "Defenras - Block & Protect Kids Online",
  "version": "2.4.9",
  "description": "Block adult content, malware, phishing & scams. PIN-locked so kids can't disable it. Zero data collection.",
  "permissions": [
    "webNavigation",
    "storage",
    "tabs",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/search*",
        "*://*.google.co.in/search*",
        "*://*.google.ca/search*",
        "*://*.google.co.uk/search*",
        "*://*.google.com.au/search*",
        "*://*.google.de/search*",
        "*://*.google.fr/search*",
        "*://*.google.co.jp/search*",
        "*://*.bing.com/search*",
        "*://*.duckduckgo.com/*",
        "*://*.yahoo.com/search*",
        "*://*.search.yahoo.com/*",
        "*://*.yandex.com/search*",
        "*://*.yandex.ru/search*",
        "*://*.ecosia.org/search*",
        "*://*.search.brave.com/*",
        "*://*.startpage.com/*",
        "*://*.aol.com/search*",
        "*://*.ask.com/web*",
        "*://*.baidu.com/s*",
        "*://*.search.aol.com/*",
        "*://*.swisscows.com/web*",
        "*://*.qwant.com/*",
        "*://*.searx.me/*",
        "*://*.mojeek.com/search*"
      ],
      "js": [
        "src/search-ratings.js"
      ],
      "css": [
        "src/search-ratings.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/page-guard.js"
      ],
      "css": [
        "src/page-guard.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "src/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "src/blocked.html",
        "src/blocked.js",
        "src/uninstall-guard.html",
        "src/uninstall-guard.js",
        "icons/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "defenras@defenras.com",
      "strict_min_version": "109.0"
    }
  }
}