99+版本测试通过

方案1：仅隐藏书签栏

/*自动隐藏书签栏 2022.04.15*/
/*如果前面设置了书签栏高度的话，建议注释掉，采用默认的高度*/
/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/autohide_bookmarks_toolbar.css made available under Mozilla Public License v. 2.0
See the above repository for updates as well as full license text. */

#PersonalToolbar{
  --uc-bm-height: 20px; /* Might need to adjust if the toolbar has other buttons */
  --uc-bm-padding: 7px; /* Vertical padding to be applied to bookmarks */
  --uc-autohide-toolbar-delay: 600ms; /* The toolbar is hidden after 0.6s */
  
  /* 0deg = "show" ; 90deg = "hide" ;  Set the following to control when bookmarks are shown */
  --uc-autohide-toolbar-focus-rotation: 0deg; /* urlbar is focused */
  --uc-autohide-toolbar-hover-rotation: 0deg; /* cursor is over the toolbar area */
}

:root[uidensity="compact"] #PersonalToolbar{ --uc-bm-padding: 1px; }
:root[uidensity="touch"] #PersonalToolbar{ --uc-bm-padding: 7px }

#PersonalToolbar:not([customizing]){
  position: relative;
  margin-bottom: calc(0px - var(--uc-bm-height) - 2 * var(--uc-bm-padding));
  transform: rotateX(90deg);
  transform-origin: top;
  transition: transform 35ms linear var(--uc-autohide-toolbar-delay) !important;
  z-index: 1;
  /* The following properties should allow the themes with trasparent toolbars to work */
  background-color: transparent !important;
  background-repeat: no-repeat,no-repeat,var(--lwt-background-tiling);
  --uc-bg-y: calc(-2 * (var(--tab-block-margin) + var(--toolbarbutton-inner-padding) + var(--toolbarbutton-outer-padding)) - var(--tab-min-height) - 16px - var(--bookmark-block-padding));
  background-position: top left,top left,var(--lwt-background-alignment,top left);
  background-position-y:top,top,var(--uc-bg-y),var(--uc-bg-y),var(--uc-bg-y);
  background-image: var(--toolbar-bgimage), linear-gradient(var(--toolbar-bgcolor),var(--toolbar-bgcolor)),var(--lwt-header-image,var(--lwt-additional-images)) !important;
}

#PlacesToolbarItems > .bookmark-item,
#OtherBookmarks,
#PersonalToolbar > #import-button{
  padding-block: var(--uc-bm-padding) !important;
}

#nav-bar:focus-within + #PersonalToolbar{
  transition-delay: 20ms !important;
  transform: rotateX(var(--uc-autohide-toolbar-focus-rotation,0));
}

#navigator-toolbox:hover > #PersonalToolbar{
  transition-delay: 20ms !important;
  transform: rotateX(var(--uc-autohide-toolbar-hover-rotation,0));
}

#navigator-toolbox:hover > #nav-bar:focus-within + #PersonalToolbar {  
  transform: rotateX(0);
}

/* Uncomment to enable compatibility for multi-row_bookmarks.css */
/* This would break buttons placed in the toolbar but that is likely not happening if you are using multi-row setup  */
/*
#PersonalToolbar:not([customizing]){
  position: fixed;
  display: block;
  margin-bottom: 0px !important;
}
*/

?

方案2：隐藏书签栏和地址栏

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

#navigator-toolbox{
  --uc-bm-padding: 4px; /* Vertical padding to be applied to bookmarks */
  --uc-bm-height: calc(20px + 2 * var(--uc-bm-padding)); /* Might need to adjust if the toolbar has other buttons */
  --uc-navbar-height: -40px; /* navbar is main toolbar. Use negative value */
  --uc-autohide-toolbar-delay: 600ms; /* The toolbar is hidden after 0.6s */
}

:root[uidensity="compact"] #navigator-toolbox{
  --uc-bm-padding: 1px;
  --uc-navbar-height: -34px;
}
:root[uidensity="touch"] #navigator-toolbox{ --uc-bm-padding: 6px }

:root[sessionrestored] #nav-bar,
:root[sessionrestored] #PersonalToolbar{
  background-image: linear-gradient(var(--toolbar-bgcolor),var(--toolbar-bgcolor)), var(--lwt-additional-images,var(--toolbar-bgimage))  !important;
  background-position: top,var(--lwt-background-alignment);
  background-position-y: calc(0px - var(--tab-min-height) - 2*var(--tab-block-margin,0px));
  background-repeat: repeat,var(--lwt-background-tiling);
  transform: rotateX(90deg);
  transform-origin: top;
  transition: transform 135ms linear var(--uc-autohide-toolbar-delay) !important;
  z-index: 2;
}

:root[sessionrestored] #PersonalToolbar{
  z-index: 1;
  background-position-y: calc(0px - var(--tab-min-height) - 2*var(--tab-block-margin,0px) + var( --uc-navbar-height));
}

:root[lwtheme-image] #nav-bar,
:root[lwtheme-image] #PersonalToolbar{
  background-image: linear-gradient(var(--toolbar-bgcolor),var(--toolbar-bgcolor)),var(--lwt-header-image), var(--lwt-additional-images,var(--toolbar-bgimage)) !important;
}

#nav-bar[customizing],#PersonalToolbar[customizing]{ transform: none !important }

#navigator-toolbox > #PersonalToolbar{
  transform-origin: 0px var(--uc-navbar-height);
  position: relative;
}

:root[sessionrestored]:not([customizing]) #navigator-toolbox{
  margin-bottom:  calc(0px - var(--uc-bm-height) + var(--uc-navbar-height));
}
#PlacesToolbarItems > .bookmark-item {
  min-height: calc(var(--uc-bm-height) - 4px); /* Bookmarks have 2px block margin */
  padding-block: 0px !important;
}

#OtherBookmarks,
#PlacesChevron,
#PersonalToolbar > #import-button{
  padding-block: var(--uc-bm-padding) !important;
}

/* Make sure the bookmarks toolbar is never collapsed even if it is disabled */
:root[sizemode="fullscreen"] #PersonalToolbar,
#PersonalToolbar[collapsed="true"]{
  min-height: initial !important;
  max-height: initial !important;
  visibility: hidden !important
}
#PersonalToolbar[collapsed="true"] #PlacesToolbarItems > *,
:root[sizemode="fullscreen"] #PersonalToolbar #PlacesToolbarItems > *{
  visibility: hidden !important;
}

/* The invisible toolbox will overlap sidebar so we'll work around that here */
#navigator-toolbox{ pointer-events: none; border-bottom: none !important; }
#PersonalToolbar{ border-bottom: 1px solid var(--chrome-content-separator-color) }
#navigator-toolbox > *{ pointer-events: auto }

#sidebar-box{ position: relative }

/* Selected tab needs higher z-index now to "hide" the broder below it */
.tabbrowser-tab[selected]{ z-index: 3 !important; }

/* SELECT TOOLBAR BEHAVIOR */
/* Comment out or delete one of these to disable that behavior */

/* Show when urlbar is focused */
#nav-bar:focus-within + #PersonalToolbar,
#navigator-toolbox > #nav-bar:focus-within{
  transition-delay: 100ms !important;
  transform: rotateX(0);
}

/* Show when cursor is over the toolbar area */
#navigator-toolbox:hover > .browser-toolbar{
  transition-delay: 100ms !important;
  transform: rotateX(0);
}
/* This makes the tab notification box show immediately below tabs, otherwise it would break the layout */
#navigator-toolbox > div{ display: contents }
:where(#titlebar,#tab-notification-deck,.global-notificationbox){
  -moz-box-ordinal-group: 0;
}
/* Show when cursor is over popups/context-menus - cannot control which ones */
/*
#mainPopupSet:hover ~ box > toolbox > .browser-toolbar{
  transition-delay: 100ms !important;
  transform: rotateX(0);
}
*/

/* Uncomment the next part to enable compatibility for multi-row_bookmarks.css
 * This would break buttons placed in the toolbar,
 * but that is likely not happening if you are using multi-row setup
 */
 
/*
#navigator-toolbox{ margin-bottom: var(--uc-navbar-height) !important; }
#PersonalToolbar:not([customizing]){
  position: fixed !important;
  display: block;
  margin-bottom: 0px !important;
}
*/

?

方案3：隐藏书签栏+地址栏+标签栏（通过ctrl+L快捷键来访问url地址框，实现恢复查看）

/* 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;
}

/* Dummy variable to support versions 94-96, can be removed when 96 lands */
:root{ --lwt-frame: var(--lwt-accent-color) }

[url=home.php?mod=space&uid=880893]@media[/url]  (-moz-platform: windows),
        (-moz-os-version: windows-win7),
        (-moz-os-version: windows-win10){

  :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 8px !important; }

  @media screen and (min-resolution: 1.25dppx){
    :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 7px !important; }
  }
  @media screen and (min-resolution: 1.5dppx){
    :root[tabsintitlebar][sizemode="maximized"]:not([inDOMFullscreen]) > body > box{ margin-top: 6px !important; }
  }
  @media screen and (min-resolution: 2dppx){
    :root[tabsintitlebar][sizemode="maximized"] #navigator-toolbox{ margin-top: -1px; }
  }
  #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-frame,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 */
/*
:root{ --uc-titlebar-padding: 0px !important; }
#navigator-toolbox{ flex-direction: column; display: flex; }
#titlebar{ order: 2 }
*/