kasi-time enabler

kasi-time.user.js

// ==UserScript==
// @name       kasi-time enabler
// @namespace  http://example.com/
// @version    0.2
// @description  
// @match      http://www.kasi-time.com/*
// @copyright  2012+, You
// @downloadUrl https://gist.github.com/seangenabe/cc7cd26c791d16d244d7/raw/kasi-time.user.js
// @updateUrl   https://gist.github.com/seangenabe/cc7cd26c791d16d244d7/raw/kasi-time.user.js
// ==/UserScript==

var filter = Function.prototype.call.bind(Array.prototype.filter);

var body = document.body;

body.oncontextmenu = null;
body.onselectstart = null;
body.oncopy = null;
body.style.webkitUserSelect = 'initial';
document.onkeydown = null;

$(window).load(function() {
    var lyrics = document.getElementById('lyrics')
    lyrics.style.webkitUserSelect = null;
    
    $('body').off('copy contextmenu selectstart', false);
    $('body').css({
        '-moz-user-select': 'initial',
        '-khtml-user-select': 'initial',
        '-ms-user-select': 'initial',
        '-webkit-user-select': 'initial',
        'user-select': 'initial'
    })
    
    // Adds a Select All button to quickly select all lyrics.
    var button = document.createElement('button');
    button.addEventListener('click', function() {
        var selection = window.getSelection();
        selection.removeAllRanges();
        var range = document.createRange();
        range.selectNode(lyrics);
        selection.addRange(range);
    });
    button.appendChild(document.createTextNode('Select All'));
    document.querySelector('.lyrics_menu').appendChild(button);
    
    // Enables printing
    var limitingStyle = filter(document.head.querySelectorAll('style'), function(s) {
        return ~s.innerText.indexOf("印刷禁止");
    });
    $(limitingStyle).remove();
    
    // Remove ads
    $('.ad, .ad2').remove();
});

Doesn't work in Firefox 57 and Greasemonkey 4. Try https://github.com/furyutei/KashiKaikin instead.