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;
}

#nav-bar {
    margin-right:140px;
}

/* Some space on top to allow window dragging */
#titlebar {
    appearance: none !important;
    height: 5px;
}

/* Fix for main menu calling by Alt button */
#titlebar > #toolbar-menubar {
    margin-top: 10px;
}

.titlebar-buttonbox-container {
  display: block;
  height: 50px;
  margin-top: -5px;
}

.titlebar-buttonbox-container .titlebar-button {
  display: block;
  height: 45px;
}

/* Hide sidebar header */
#sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
  display: none;
}