/* Reduce width */
@media (-moz-bool-pref: "zen.view.sidebar-expanded") {
  #navigator-toolbox {
    --zen-navigation-toolbar-min-width: 100px !important;
  }
}

/* Reduced height */
@media (-moz-bool-pref: "zen.view.compact.hide-tabbar") {
  :root[zen-compact-mode="true"] #navigator-toolbox {
    margin-top: 9.375vh !important;
    height: 75vh !important;
  }
}