librewolf/chrome/userChrome.css

   1 /* hide tabs */
   2 #main-window[tabsintitlebar="true"]:not([extradragspace="true"]):not([customizing]) #tabbrowser-tabs,
   3 #main-window[tabsintitlebar="true"]:not([extradragspace="true"]):not([customizing]) #alltabs-button,
   4 /* hide tst header */
   5 #main-window:not([customizing]) #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] > #sidebar-header {
   6     visibility: collapse !important;
   7 }
   8
   9 /* Hide sidebar with one tab */
  10 #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] {
  11     transition: all 0.2s ease;
  12 }
  13 #main-window:not([customizing])
  14   #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"]:not(:has([data-current-uri="about:newtab"])):not(:hover) {
  15     z-index: 2 !important;
  16     overflow: hidden;
  17     min-width: 2px !important;
  18     max-width: 2px !important;
  19 }