http://userstyles.org/styles/46844/ameblo-jp-atsuko-maeda-hidden-some-elements

gistfile1.css

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix("http://ameblo.jp/atsuko-maeda") {
    #amebaBar,
    #message,
    #advertising3,
    #footer_ad_official,
    #sub_a,
    #themeBox,
    #exLinkBtn,
    #sub_b .plugin,
    #calendar,
    #freespace,
    #ameblo,
    #adArea,
    #footerArea,
    #rc_box,
    .readerMainLink,
    .ad_frame {
        display: none !important;
    }

    #talentPhoto,
    #blogInfo.mdl,
    #randomImgLi.mdl,
    #newPhotoMdl.mdl,
    #header.clr,
    #subCol .induceBnr {
        display: none !important;
    }

    #main {
        width: 100% !important;
        float: none !important;
        padding: 0 !important;
    }

    #sub_b {
        width: 100% !important;
        float: none !important;
    }

    #recent_entries .menu_title,
    #archives .menu_title {
        background: transparent !important;
        text-indent: 0 !important;
        height: auto !important;
        line-height: 1.5 !important;
        border-bottom: 1px solid #7C897E !important;
        padding: 0 0 0 5px !important;
        margin: 5px !important;
    }

    #recent_entries li,
    #archives li {
        list-style-type: disc !important;
        margin: 0 0 0 1em !important;
        padding: 0 !important;
        font-size: 12px !important;
    }

    .articlePaging,
    .topPaging {
        width: 100% !important;
    }

    .entry .contents,
    #message .contents {
        font-size: 14px !important;
    }
}