Firefox scrollbar auto-hide?

Question

css

I'm using userChrome.css to hide the entire Firefox interface and show it on hover. Now it looks like this:

without guidance

on hover

userChrome.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 */

/* 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: 79deg;  /* This may need to be lower on mac - like 75 or so */
  scrollbar-width: 5px !important;
}

:root[sizemode="maximized"]{
  --uc-toolbox-rotation: 79deg;  /*чем меньше параметр тем дальше от границы срабатывает hover*/
}

scrollbar {
      scrollbar-color: #aaa #fff !important;
       scrollbar-width: thin !important; }

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

  :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 9px !important; }
  :root[tabsintitlebar][sizemode="maximized"] #navigator-toolbox{ margin-top: -1px }

  @media screen and (min-resolution: 1.25dppx){
    :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 8px !important; }
  }
  @media screen and (min-resolution: 1.5dppx){
    :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 8px !important; }
  }
  @media screen and (min-resolution: 2dppx){
    :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 7px !important; }
  }
  #navigator-toolbox:not(:-moz-lwtheme){ background-color: rgb(32, 35, 64) !important; }
}

:root[sizemode="fullscreen"]{ margin-top: 0px !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 }

userContent.css

* {
  scrollbar-color: #aaa #fff !important;
  scrollbar-width: thin !important;
}

@-moz-document url-prefix("about:"),
@-moz-document url-prefix("chrome://mozapps/content/extensions/aboutaddons.html") {
  window,
  page,
  html,
  .main-content,
  scrollbar {
    scrollbar-color: #aaa #fff !important;
    scrollbar-width: thin !important;
  }
}

How to make the same behavior for the scrollbar? So that it automatically hides, and appears on hover.

Answer 1

Extension : https://addons.mozilla.org/en-US/firefox/addon/and...