Firefox custom css for auto hide of top bar and side bar

userChrome.css

/* tab bar auto hide */
@-moz-document url(chrome://browser/content/browser.xul),
               url(chrome://browser/content/browser.xhtml) {

  /* show tabs toolbar when navigator-toolbox gets hovered */
  #main-window:not([customizing]) #navigator-toolbox:hover #TabsToolbar {
	  visibility: visible !important;
	  opacity: 1 !important;
	  margin-bottom: 0px;
	  transition: visibility 0.1s linear, opacity 0.1s linear, margin-bottom 0.1s linear;
  }
  /* hide tabs toolbar when unfocused */
  #main-window:not([customizing]) #TabsToolbar:not(:hover) {
	  visibility: collapse !important;
	  opacity: 0 !important;
	  margin-bottom: -40px;
	  transition: visibility 0.1s linear, opacity 0.1s linear, margin-bottom 0.1s linear;
  }

  #personal-bookmarks{
    padding-left: 40px;
  }

  #sidebar-box{
	--uc-sidebar-width: 40px;
	--uc-sidebar-hover-width: 210px;
	--uc-autohide-sidebar-delay: 600ms; /* Wait 0.6s before hiding sidebar */
	--uc-autohide-transition-duration: 115ms;
	--uc-autohide-transition-type: linear;
	position: relative;
	min-width: var(--uc-sidebar-width) !important;
	width: var(--uc-sidebar-width) !important;
	max-width: var(--uc-sidebar-width) !important;
	z-index:1;
  }
  
  #sidebar-box[positionend]{ direction: rtl }
  #sidebar-box[positionend] > *{ direction: ltr }
  
  #sidebar-box[positionend]:-moz-locale-dir(rtl){ direction: ltr }
  #sidebar-box[positionend]:-moz-locale-dir(rtl) > *{ direction: rtl }
  
  #main-window[sizemode="fullscreen"] #sidebar-box{ --uc-sidebar-width: 1px; }
  
  #sidebar-splitter{ display: none }
  
  #sidebar-header{
	overflow: hidden;
	color: var(--chrome-color, inherit) !important;
	padding-inline: 0 !important;
  }
  
  #sidebar-header::before,
  #sidebar-header::after{
	content: "";
	display: flex;
	padding-left: 8px;
  }
  
  #sidebar-header,
  #sidebar{
	transition: min-width var(--uc-autohide-transition-duration) var(--uc-autohide-transition-type) var(--uc-autohide-sidebar-delay) !important;
	min-width: var(--uc-sidebar-width) !important;
	will-change: min-width;
  }
  #sidebar-box:hover > #sidebar-header,
  #sidebar-box:hover > #sidebar{
	min-width: var(--uc-sidebar-hover-width) !important;
	transition-delay: 0ms !important;
  }
  
  .sidebar-panel{
	background-color: transparent !important;
	color: var(--newtab-text-primary-color) !important;
  }
  
  .sidebar-panel #search-box{
	-moz-appearance: none !important;
	background-color: rgba(249,249,250,0.1) !important; 
	color: inherit !important;
  }
  
  /* Add sidebar divider and give it background */
  
  #sidebar,
  #sidebar-header{
	background-color: inherit !important;
	border-inline: 1px solid rgb(80,80,80);
	border-inline-width: 0px 1px;
  }
  
  #sidebar-box:not([positionend]) > :-moz-locale-dir(rtl),
  #sidebar-box[positionend] > *{
	border-inline-width: 1px 0px;
  }
  
  /* Move statuspanel to the other side when sidebar is hovered so it doesn't get covered by sidebar */
  
  #sidebar-box:not([positionend]):hover ~ #appcontent #statuspanel{
	inset-inline: auto 0px !important;
  }
  #sidebar-box:not([positionend]):hover ~ #appcontent #statuspanel-label{
	margin-inline: 0px !important;
	border-left-style: solid !important; 
  }
}