userChrome for Tree Style Tabs on Firefox 89 - Removes tabs on top and colors to dark mode

userChrome.css

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar > .toolbar-items {
  opacity: 0;
  pointer-events: none;
}
#main-window:not([tabsintitlebar="true"]) #TabsToolbar {
    visibility: collapse !important;
}

#sidebar-box[sidebarcommand=treestyletab_piro_sakura_ne_jp-sidebar-action] #sidebar-header { 
  display: none 
}

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) .titlebar-spacer {
  display: none;
}

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) .titlebar-buttonbox-container {
  margin-top: -8px;
}

#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar {
  background-color: rgb(43,43,51);
  height: 15px
}


#main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #nav-bar {
  box-shadow: none !important;
}