betterlyric.user.js

// ==UserScript==
// @name           better Lyric
// @namespace      http://oquno.com/
// @include        http://music.goo.ne.jp/lyric/LYR*
// @description    fix goo music lyric
// ==/UserScript==
(function(){
    unsafeWindow.appendLyric = function(data){
        document.querySelector('#canvas').style.display = 'none';
        var kashi = document.createElement('div');
        for(var i = 0; i < data.length; i++){
            var p = document.createElement('span');
            p.innerHTML = data[i] + "<br />";
            kashi.appendChild(p);
        }
        document.getElementById("lyric_area").appendChild(kashi);
    }

    var script = document.querySelectorAll("#incontents script")[1];
    var api = script.innerHTML.match(/'(\/.*print_json[^']*)'/)[1].replace(/draw/, 'appendLyric');
    var insert = document.createElement('script');
    insert.src = api;
    document.querySelectorAll('head')[0].appendChild(insert);
})();