@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

    #TabsToolbar {
     height: 20px !important;
     background-image: none !important;
    }
    .tabbrowser-tab {
     margin-top: 1px !important;
     margin-right: 0 !important;
     margin-bottom: 0 !important;
     padding: 0px 5px !important;
     border-style: none !important;
     border-width: 0 !important;
     border-radius: 0 !important;
     border-image: none !important;
     background: transparent !important;
    }
    .tabbrowser-tab .tab-text {
     text-align: center;
     padding-right: 10px;
     padding-left: 10px;
     margin-top: 0px !important;
     border-bottom: solid rgba(255,255,255,.0);
     transition: .5s;
     margin-top: 0px !important;
    }
    .tabbrowser-tab:hover .tab-text {
     border-bottom: solid #8AA37B !important;
     transition: .5s;
    }
    #main-window .tabbrowser-tab[selected] .tab-text{
     border-bottom: solid #8AA37B;
     transition: .5s;
    }
    .tabbrowser-tab .tab-icon-image, .tab-throbber, .tab-close-button {
     display: none  !important;
    }
    .scrollbutton-up,
    .scrollbutton-down {
        display: none !important;
    }