/* Hide tabs unless cursor is on top of toolbar */

@keyframes slidein{
  from{ margin-top: calc(0px - var(--tab-min-height)) }
  to{ margin-top: 0 }
}
@keyframes slideout{
  from{ margin-top: var(--tab-min-height) }
  to{ margin-top: 0 }
}
#navigator-toolbox:not(:hover) > #titlebar{ -moz-appearance: none !important }
#navigator-toolbox:not(:hover)  #TabsToolbar:not([customizing]) { visibility: collapse }
#navigator-toolbox:hover > #nav-bar:not([customizing]){ animation: slidein ease-out 48ms 1 }
#navigator-toolbox:not(:hover) > #nav-bar:not([customizing]){ animation: slideout ease-out 48ms 1 }