Examine source code of GGPoisk

{
  "manifest_version": 3,
  "name": "GGPoisk Switcher",
  "version": "1.0",
  "description": "Переключает между Kinopoisk и GGPoisk одним кликом",
  "browser_specific_settings": {
    "gecko": {
      "id": "ggpoisk-switcher@yourdomain.org",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "tabs",
    "scripting",
    "notifications"
  ],
  "host_permissions": [
    "*://*.kinopoisk.ru/*",
    "*://*.ggpoisk.ru/*"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Перейти на GGPoisk"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "commands": {
    "switch-ggpoisk": {
      "suggested_key": {
        "default": "Ctrl+Shift+G"
      },
      "description": "Переключить между Kinopoisk и GGPoisk"
    }
  }
}