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

* {
    font-size:12px;
}

#sidebar {
    min-width:20em !important;
    max-width:20em !important;
    border-right:1px solid rgba(30,30,30) !important;
}

#sidebar-header:nth-last-child(2) > *:last-child {
    visibility: collapse;
}

#sidebar-splitter {
    visibility: collapse;
}

#toolbar-menubar[inactive="true"] + #TabsToolbar {
  visibility: collapse !important;
}

#sidebar-box[sidebarcommand="tabcenter-reborn_ariasuni-sidebar-action"] #sidebar-header { visibility: collapse !important; }