mobile-config-firefox/chrome/autohide_toolbox.css

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

/* Hide the whole toolbar area unless urlbar is focused or cursor is over the toolbar */
/* Dimensions on non-Win10 OS probably needs to be adjusted */

/* Compatibility options for hide_tabs_toolbar.css and tabs_on_bottom.css at the end of this file */

:root{
  --uc-autohide-toolbox-delay: 200ms; /* Wait 0.1s before hiding toolbars */
  --uc-toolbox-rotation: 82deg;  /* This may need to be lower on mac - like 75 or so */
}

:root[sizemode="maximized"]{
  --uc-toolbox-rotation: 88.5deg;
}

@media  (-moz-platform: windows),
        (-moz-os-version: windows-win7),
        (-moz-os-version: windows-win10){

  #navigator-toolbox:not(:-moz-lwtheme){ background-color: -moz-dialog !important; }
}

:root[sizemode="fullscreen"],
#navigator-toolbox[inFullscreen]{ margin-top: 0 !important; }

#navigator-toolbox{
  position: fixed !important;
  display: block;
  background-color: var(--lwt-accent-color,black) !important;
  transition: transform 82ms linear, opacity 82ms linear !important;
  transition-delay: var(--uc-autohide-toolbox-delay) !important;
  transform-origin: top;
  transform: rotateX(var(--uc-toolbox-rotation));
  opacity: 0;
  line-height: 0;
  z-index: 1;
  pointer-events: none;
}


/* #mainPopupSet:hover ~ box > toolbox, */
/* Uncomment the above line to make toolbar visible if some popup is hovered */
#navigator-toolbox:hover,
#navigator-toolbox:focus-within{
  transition-delay: 33ms !important;
  transform: rotateX(0);
  opacity: 1;
}

#navigator-toolbox > *{ line-height: normal; pointer-events: auto }

#navigator-toolbox,
#navigator-toolbox > *{
  width: 100vw;
  -moz-appearance: none !important;
}

/* These two exist for oneliner compatibility */
#nav-bar{ width: var(--uc-navigationbar-width,100vw) }
#TabsToolbar{ width: calc(100vw - var(--uc-navigationbar-width,0px)) }

/* Don't apply transform before window has been fully created */
:root:not([sessionrestored]) #navigator-toolbox{ transform:none !important }

:root[customizing] #navigator-toolbox{
  position: relative !important;
  transform: none !important;
  opacity: 1 !important;
}

#navigator-toolbox[inFullscreen] > #PersonalToolbar,
#PersonalToolbar[collapsed="true"]{ display: none }

/* Uncomment this if tabs toolbar is hidden with hide_tabs_toolbar.css */
 /*#titlebar{ margin-bottom: -9px }*/

/* Uncomment the following for compatibility with tabs_on_bottom.css - this isn't well tested though */
/*
#navigator-toolbox{ flex-direction: column; display: flex; }
#titlebar{ order: 2 }
*/