Examine source code of Sub Control

{
  "manifest_version": 3,
  "name": "Sub Control",
  "description": "Добавляйте подписки в Sub Control с текущего сайта.",
  "version": "0.1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "sub-control@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "192": "icons/icon-192.png",
    "512": "icons/icon-512.png"
  },
  "action": {
    "default_title": "Sub Control",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png",
      "192": "icons/icon-192.png",
      "512": "icons/icon-512.png"
    }
  },
  "background": {
    "scripts": [
      "shared/browser-api.js",
      "shared/config.js",
      "background/service-worker.js"
    ]
  },
  "options_page": "options/options.html",
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; img-src 'self' http: https: data:;"
  },
  "permissions": [
    "activeTab",
    "cookies",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/page-detect.js"
      ],
      "run_at": "document_idle"
    }
  ]
}