Restore/Save Audio Volume

audioVolume.js

javascript:$.getScript('//cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js', function(){
  audioVolume = $.cookie('audioVolume');
  $('audio').each(function(){
    if (audioVolume) {
      this.player.setVolume(audioVolume);
    }
    $(this).on('volumechange', function(){
      $.cookie('audioVolume', this.player.getVolume(), {expires: 100, path: '/'});
    });
  });
});