適当に書いてみた。 Before After @namespace url(http://www.w3.org/1999/xhtml); @-moz-document domain("dic.nicovideo.jp") { a.auto, a.auto-hdn { color: inherit !important; border-bottom: 1px solid silver !important; margin: auto 1px !important; } a.auto:hover, a.auto-hdn:hover, a.auto:focus, a.auto-hdn:focus { text-decoration: none !important; border-bottom-color: #ff8800 !important; color: #ff8800 !importan