Examine source code of Clone Radar for Ozon

{
  "manifest_version": 3,
  "name": "Clone Radar for Ozon",
  "version": "1.3",
  "description": "Поиск похожих карточек товаров на маркетплейсе Ozon",
  "browser_specific_settings": {
    "gecko": {
      "id": "cloneradar@egorovdp.ru",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "https://*.ozon.ru/*",
    "https://*.ozone.ru/*",
    "https://*.ozonusercontent.com/*",
    "https://*.ozonapi.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Clone Radar for Ozon",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.ozon.ru/*",
        "https://seller.ozon.ru/*"
      ],
      "js": [
        "content/matcher.js",
        "content/image-matcher.js",
        "content/ozon.js"
      ],
      "css": [
        "content/overlay.css"
      ],
      "run_at": "document_idle",
      "all_frames": true,
      "match_about_blank": true
    }
  ]
}