lyric-select.user.js

// ==UserScript==
// @name        Lyric Select
// @namespace   github.com/mavc
// @include     http://www.kasi-time.com/*
// @include     http://j-lyric.net/*
// @include     https://www.uta-net.com/*
// @version     1.0
// @grant       unsafeWindow
// ==/UserScript==

(function () {
  const MAPPING = [
    {
      key: 'kasi-time',
      handler() {
        let $ = unsafeWindow.jQuery;
        $("body").off();
        $("head style").remove();
      }
    },
    {
      key: 'j-lyric',
      handler() {
        let b = document.querySelector('body');
        b.removeAttribute('oncontextmenu');
        b.removeAttribute('onselectstart');
      }
    },
    {
      key: 'uta-net',
      handler() {
        let $ = unsafeWindow.jQuery;
        $("body").unbind();
        $("#flash_area > img").remove();
      }
    }
  ];

  const url = window.location.host;
  for (let { key, handler } of MAPPING) {
    if (url.includes(key)) {
      window.addEventListener("load", handler);
      break;
    }
  }
})();