Firefoxでもマウスオンでほわっと変化させる

a.fuwatto {

 padding: 10px;

 background: #ededed;

 -webkit-transition: all 0.3s ease;

 -moz-transition: all 0.3s ease;

 -o-transition: all 0.3s ease;

 transition: all 0.3s ease;

 }

a.fuwatto:hover,

a.fuwatto:focus {

 background: #690;

 }