My CSS

#main-window {
    -moz-appearance:none !important;
    background: #171717 !important;
    font-family: Open Sans;
    border-left: 1px solid #000000;
    border-right: 1px solid #000000;
    margin-right: -1px;
}
#main-window:not([chromehidden*="toolbar"])[sizemode="normal"] {
    margin-top:-21px!important;
}
#TabsToolbar{
    background: #171717 !important;
    font-family: Open Sans;
    font-size: 9pt;
    max-height: 24px!important;
    min-height: 24px!important;
}
#main-window #tabbrowser-tabs tab .tab-throbber,
#main-window #tabbrowser-tabs tab .tab-icon-image,
.tabbrowser-tab:not([pinned]) .tab-icon-image {
    display: none !important;
}
#nav-bar{
    font-family: Open Sans;
    max-height:20px!important;
    min-height:20px!important;
    margin-left: 0px !important;
    margin-right: 0px !important;
    background: #171717 !important;
}
#urlbar {
    max-height: 19px!important;
    min-height: 19px!important;
    margin-top: 2px !important;
    border: none !important;
    background: #171717 !important;
    padding-left: 5px !important;
    color: #ffffff !important;
    font-size: 8pt;
    font-family: Open Sans;
}
.tabs-newtab-button {
    max-width: 18px !important;
    min-width: 18px !important;
    background: #171717 !important;
    color: #ffffff !important;
    border: none !important;
}
.tabs-newtab-button:hover {
    background: #171717 !important;
}
#identity-box,
#urlbar-icons > image,
#urlbar-container dropmarker
{
    display: none !important;
}
#tabbrowser-tabs tab {
    padding-left: 5px !important;
    padding-right: 3px !important;
    padding-top: 8px !important;
    background: #171717 !important;
    border-top: none !important;
    border-left: #000000 !important;
    border-right: #000000 !important;
    color: #ffffff !important;
    margin-left: 0px !important;
    text-align: center !important;
    margin-top: -7px !important;
    margin-bottom: 5px !important;
    height: 20px !important;
    overflow: hidden;
}
#tabbrowser-tabs tab:hover {
    background: #303030 !important;
}
#tabbrowser-tabs tab[selected] {
    background: #484625 !important;
}
.tab-close-button {
    display: none !important;
}
#content browser{
    margin-right: -14px !important;
    margin-left: -1px !important;
    margin-bottom: 0px !important;
}
#urlbar #notification-popup-box {
    display: none !important;
}
#addon-bar {
    background: #171717;
    height: 23px !important;
    font-family: Open Sans;
}
#addonbar-closebutton {
    display: none;
}