Mez CSS

    /* HIDE STUFF BELOW */
    #identity-box,
    #urlbar-icons > image,
    #urlbar-container dropmarker,
    #appmenu-button .button-text,
    #appmenu-button .button-menu-dropmarker
    #appmenu-toolber
    #browser-border-end
    #back-button .toolbarbutton-icon,
    #forward-button .toolbarbutton-icon,
    #reload-button .toolbarbutton-icon,
    #urlbar-reload-button .toolbarbutton-icon,
    #stop-button .toolbarbutton-icon,
    #urlbar-stop-button .toolbarbutton-icon,
    #tabbrowser-tabs tab .tab-close-button .toolbarbutton-icon,
    #new-tab-button .toolbarbutton-icon,
    #appmenu-button .button-icon
    #search-container
    #searchbar
    #urlbar
    {
            display:none!important;
    }


    /* TABS */
    #main-window #tabbrowser-tabs tab
    {
                background:#222222!important;
                    border:0!important;
                        color:rgba(83,103,81,1)!important;
                            text-shadow:rgba(0,0,0,0) 0 0 0px!important;
                                font-family:Haxrcorpttf !important;
                                font-size: 12px;
    }
    #main-window[sizemode="normal"] #tabbrowser-tabs tab
    {
            margin:3px 3px -3px!important;
                max-height:16px!important;
                    padding:0 0px!important;
    }

    .tabbrowser-tabs .tab-text {
           font-family:Haxrcorpttf !important;
              font-size: 12pt !important;
                 font-weight: normal !important;

    }

    /* Change height */
    toolbar, menubar
    {
        height: 1.9em;
    }

    /* STUFF */
    #main-window[sizemode="maximized"] #tabbrowser-tabs tab,
    #main-window[sizemode="fullscreen"] #tabbrowser-tabs tab
    {
            border-top:0!important;
                margin:0px 1px 0!important;
                    max-height:16px!important;
                        padding:0 2px!important;
                            border-radius:0 0 8px 8px!important;
    }
    #main-window #tabbrowser-tabs tab[selected]
    {
            color:rgba(133,156,129,1)!important;
    }
    #main-window #tabbrowser-tabs tab .tab-throbber,
    #main-window #tabbrowser-tabs tab .tab-icon-image
    {
            max-height:0px!important;
                max-width:0px!important;
                    margin-top:0px!important;
    }
    #main-window #tabbrowser-tabs tab[fadein]
    {
            -moz-transition:all .2s ease-in-out!important;
    }
    #main-window #tabbrowser-tabs tab:not([selected]):hover
    {
            color:rgba(133,156,129,1)!important;
    }
    #main-window #tabbrowser-tabs tab .tab-close-button
    {
            opacity:0!important;
                -moz-transition:all .1s ease-in-out!important;
    }
    #main-window #tabbrowser-tabs tab .tab-close-button .toolbarbutton-icon
    {
            max-height:10px!important;
                max-width:10px!important;
    }
    #main-window #tabbrowser-tabs tab[selected] .tab-close-button,
    #main-window #tabbrowser-tabs tab:hover .tab-close-button
    {
            opacity:1!important;
    }
    #main-window #tabbrowser-tabs tab[fadein]:not([pinned])
    {
            min-width:40px!important;
                max-width:1920px!important;
    }
    #main-window #tabbrowser-tabs tab[pinned]
    {
            max-width:24px!important;
                min-width:24px!important;
    }
    #main-window #tabbrowser-tabs tab[pinned] .tab-close-button
    {
            display:none!important;
    }

    /* MAIN WINDOW */
    #main-window #urlbar,
    #main-window #urlbar-container
    {
            max-width:160px!important;
    }
    #main-window:not([chromehidden*="toolbar"])[sizemode="normal"]
    {
            margin-top:-25px!important;
    }
    #main-window[sizemode="normal"] #TabsToolbar
    {
            margin-top:2px!important;
                padding:0 105px 2px 1px!important;
    }
    #main-window[sizemode="fullscreen"] #TabsToolbar,
    #main-window[sizemode="maximized"] #TabsToolbar
    {
            margin:-5px -14px 0 -10px!important;
                padding:0 0 2px!important;
    }
    #main-window #browser-border-start
    {
            background:#222222!important;
                border:0!important;
    }
    #main-window #appmenu-button
    {
            background:transparent!important;
                border:0!important;
                    padding:0px 5px!important;
                        min-width:16px!important;
                            box-shadow:none!important;
    }
    #main-window[sizemode="normal"] #appmenu-button
    {
            margin:-16px -5px -20px!important;
    }
    #main-window[sizemode="fullscreen"] #appmenu-button,
    #main-window[sizemode="maximized"] #appmenu-button
    {
            margin:0!important;
    }

    window{
            background: #222222!important;
                }