Examine source code of inside4you.ru

{
  "manifest_version": 2,
  "name": "inside4you.ru",
  "version": "1.15",
  "description": "Аналитика и статистика продаж на Wildberries в одном сервисе",
  "browser_specific_settings": {
    "gecko": {
      "id": "support@cherokeesoft.com",
      "strict_min_version": "42.0"
    }
  },
  "icons": {
    "128": "img/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "img/icon128.png",
    "default_title": "inside4you.ru - аналитика и статистика продаж на Wildberries",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://wildberries.ru/*",
        "https://*.wildberries.ru/*"
      ],
      "css": [
        "style/styles.css"
      ],
      "js": [
        "js/chart.js",
        "js/extension.js",
        "js/moment.min.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}