Examine source code of Onlyshortcuts - Access to links with shortcuts

{
  "manifest_version": 3,
  "name": "Onlyshortcuts",
  "description": "Reach frequently used web links faster by using pre-set, easy-to-remember shortcuts instead of typing out the full URL.",
  "version": "1.1",
  "background": {
    "scripts": [
      "js/jquery.js",
      "js/functions.js",
      "js/background.js"
    ]
  },
  "action": {
    "default_title": "Onlyshortcuts"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "img/logos/logo-color-16.png",
    "48": "img/logos/logo-color-48.png",
    "128": "img/logos/logo-color-128.png",
    "256": "img/logos/logo-color-256.png",
    "512": "img/logos/logo-color-512.png",
    "1024": "img/logos/logo-color-1024.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "*://www.google.com/search",
    "*://www.bing.com/search",
    "*://www.ecosia.org/search",
    "*://go.mail.ru/search",
    "*://duckduckgo.com/*",
    "*://search.yahoo.com/search*",
    "*://yandex.com/search",
    "*://yandex.ru/search",
    "*://yandex.ua/search",
    "*://yandex.by/search",
    "*://yandex.kz/search",
    "*://yandex.uz/search",
    "*://yandex.com.tr/search",
    "*://yandex.fr/search"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{90dad141-0a3d-428b-9fd2-b33e3d62c45a}"
    }
  }
}