bookmarks only i think

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */

:root {
	--arrowpanel-background: #1c1c1c!important;
	--arrowpanel-color: #f9f9fa!important;
	--panel-background: #1c1c1c!important;
}

.PanelUI-subView{
	-moz-appearance: none !important;
	color: #f9f9fa !important;
	background-color: #1c1c1c !important;
}

.Panel{
	-moz-appearance: none !important;
	color: #f9f9fa !important;
	background-color: #1c1c1c !important;
}

.panel-arrowcontent {
	-moz-appearance: none !important;
	padding: var(--arrowpanel-padding);
	color: #f9f9fa!important;
	background-color: #1c1c1c !important;
	background-clip: padding-box;
	border: 1px solid var(--arrowpanel-border-color);
	box-shadow: 0 0 4px hsla(0,0%,0%,.2);
	margin: 4px;
}

menupopup {
        background: #1c1c1c !important;
        color: #f9f9fa !important;
}

#bookmarksMenuPopup, #bookmarksMenuPopup menupopup {
  -moz-appearance: none !important;
  background-color: #1c1c1c !important;
}
#bookmarksMenuPopup menu, #bookmarksMenuPopup menuitem {
	-moz-appearance: none !important;
  color: #f9f9fa !important;
  background-color: #1c1c1c !important;
}

#bookmarks-menu{
  -moz-appearance: none !important;
  color: #f9f9fa !important;
  background-color: #1c1c1c !important;
}

:root{
	--in-content-page-color: #f9f9fa !important;
	--in-content-page-background: #0c0c0d !important;
	--in-content-text-color: #f9f9fa !important;
	--in-content-selected-text: #fff;
	--in-content-box-background: #fff;
	--in-content-box-background-odd: #f3f6fa;
	--in-content-box-background-hover: #ebebeb;
	--in-content-box-background-active: #dadada;
	--in-content-box-border-color: #d7d7db;
	--in-content-item-hover: rgba(0,149,221,0.25);
	--in-content-item-selected: #0a84ff;
	--in-content-border-highlight: #0a84ff;
	--in-content-border-focus: #0a84ff;
	--in-content-border-color: #d7d7db;
	--in-content-category-border-focus: 1px dotted #0a84ff;
	--in-content-category-text: #f9f9fa !important;
	--in-content-category-text-active: #0c0c0d;
	--in-content-category-text-selected: #0a84ff;
	--in-content-category-text-selected-active: #0060df;
	--in-content-category-background-hover: rgba(12,12,13,0.1);
	--in-content-category-background-active: rgba(12,12,13,0.15);
	--in-content-category-background-selected-hover: rgba(12,12,13,0.15);
	--in-content-category-background-selected-active: rgba(12,12,13,0.2);
	--in-content-tab-color: #424f5a;
	--in-content-link-color: #0a8dff;
	--in-content-link-color-hover: #0060df;
	--in-content-link-color-active: #003eaa;
	--in-content-link-color-visited: #0a8dff;
	--in-content-primary-button-background: #0a84ff;
	--in-content-primary-button-background-hover: #0060df;
	--in-content-primary-button-background-active: #003EAA;
	--in-content-table-border-dark-color: #d1d1d1;
	--in-content-table-header-background: #0a84ff;
}

.panel-subview-body {
	overflow-y: auto;
	overflow-x: hidden;
	-moz-box-flex: 1;
	background-color: #0c0c0c !important;
	color: #f0f0f0;
}