mobile-config-firefox/chrome/toolbarbuttons_icon+label.css

/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/toolbarbuttons_icon+label.css made available under Mozilla Public License v. 2.0
See the above repository for updates as well as full license text. */

/* Shows both icon and label for toolbarbuttons */

toolbar .toolbarbutton-1[label]{
  -moz-box-orient: vertical; /* Fx <112 compatibility */
  flex-direction: column;
  -moz-box-align: center !important; /* Fx <112 compatibility */
  align-items: center !important;
}

toolbar .toolbarbutton-1[label]:not([disabled]):hover{ background-color: var(--toolbarbutton-hover-background) !important; }

toolbar .toolbarbutton-1[label] > .toolbarbutton-icon,
toolbar .toolbarbutton-1[label] > .toolbarbutton-badge-stack{
  padding: var(--toolbarbutton-inner-padding) !important;
  padding-bottom: 0px !important;
  height: calc(var(--toolbarbutton-inner-padding) + 16px) !important;
  border: none !important;
  background-color: transparent !important;
  box-shadow: none !important;
}

toolbar .toolbarbutton-1[label] > .toolbarbutton-text {
  display: flex !important;
  min-height: 16px !important;
  padding-top: 0px !important;
  background-color: transparent !important;
  overflow: hidden;
  width: 11ch;
}
toolbar .toolbarbutton-1[label] > .toolbarbutton-text::before{
  margin-inline: auto;
}
:root:not([uidensity="compact"]) toolbar .toolbarbutton-1[label] > .toolbarbutton-text{ padding: 2px !important; }