#edit-with-js-bin {
  /* position */
  position: fixed;
  top: 0;
  right: 5px;

  /* box-model */
  display: inline-block;
  padding: 7px 5px 8px 9px;
  border: 1px solid #999;
  border-top: 0;

  /* typography & style */
  color: #777;
  text-shadow: white 0 1px 1px;
  text-decoration: none;
  font: normal 12px 'Helvetica Neue', Arial, Helvetica;
  white-space: nowrap;
  background: #ddd;

  /* slide in/out transition */
  -webkit-transition: top ease-out 100ms;
  -moz-transition: top ease-out 100ms;
  -ms-transition: top ease-out 100ms;
  -o-transition: top ease-out 100ms;
  transition: top ease-out 100ms;
}

#edit-with-js-bin:hover {
  color: #333;
}

#edit-with-js-bin img {
  vertical-align: top;
  border: 0;
  margin: -1px 0 0 3px;
}
#edit-with-js-bin {
  /* position */
  position: fixed;
  top: 0;
  right: 5px;

  /* box-model */
  display: inline-block;
  padding: 7px 5px 8px 9px;
  border: 1px solid #999;
  border-top: 0;

  /* typography & style */
  color: #777;
  text-shadow: white 0 1px 1px;
  text-decoration: none;
  font: normal 12px 'Helvetica Neue', Arial, Helvetica;
  white-space: nowrap;
  background: #ddd;

  /* slide in/out transition */
  -webkit-transition: top ease-out 100ms;
     -moz-transition: top ease-out 100ms;
       -o-transition: top ease-out 100ms;
          transition: top ease-out 100ms;
}

#edit-with-js-bin:hover {
  color: #333;
}

#edit-with-js-bin img {
  vertical-align: top;
  border: 0;
  margin: -1px 0 0 3px;
}
Remove unnecessary -ms- prefixed transition
Remove unnecessary -ms- prefixed transition

IE supports transitions without the -ms- prefix.
