// ==UserScript==
// @name     fake windows for fools
// @version  1
// @include  https://news.yahoo.co.jp/*
// @include  https://s.yimg.jp/*
// @run-at   docuemnt-start
// @grant    none
// ==/UserScript==

// Copyright waived using CC0 1.0 Universal, 2020 dyknon

let ua = window.navigator.userAgent;
let newua = ua.replace(")", "; fake Windows NT 10.0)")
  .replace("Linux", "L1nux");

Object.defineProperty(window.navigator, "userAgentOriginal", {value: ua});
Object.defineProperty(window.navigator, "userAgent", {value: newua});