改訂版

気が向いたので書き直してみました。どちらを使うかはお好みでどうぞ

@-moz-document url-prefix("http://horiemon.com/") {
.side-contents{background:#f8f9fa !important;}
.textwidget{display:none !important;}
select{display:none !important;}
ul.book-list{display:none !important;}
.tip-container{display:none !important;}
iframe{display:none !important;}
.page-wrap{background:#f8f9fa !important;}
#pageheader form{background:#f8f9fa !important;}
article.entry-page header p a{background:#f8f9fa !important;
color:#302f3d !important;}
#pageheader{position:static !important;}
h2{position:static !important;}
.entry_footer a.more, .timeline footer a.more, footer.more a, .next-back p a {border:none !important;
background:none !important;
color:#302f3d !important;}
a#totop{background:none !important;}
.social-buttom{display:none !important;}
}