.link-icon::before {
  font-family: FontAwesome;
  margin-right: 8px;
  display: inline-block;
}

a[href$="/"].link-icon::before,
a.link-icon.link-folder[href]::before {
  content: "\f07b";
}

a[href$=".html"].link-icon::before,
a.link-icon.link-html5[href]::before {
  content: "\f13b";
}