window button bar

:root{
   /* height if native titlebar is enabled, assumes empty menubar */
  --uc-menubar-height: 40px;
}
:root[tabsintitlebar]{
  /* height when native titlebar is disabled, more roomy so can fit buttons etc. */
  --uc-menubar-height: 229px;
}
:root:is([sizemode="fullscreen"],[chromehidden~="menubar"]){
  --uc-menubar-height: 0px;
}

:root:not([sizemode="fullscreen"]) #nav-bar{ border-inline-width: 0 }

#navigator-toolbox{
  -moz-window-dragging: drag;
  padding-top: var(--uc-menubar-height) !important;
}

:root:not([chromehidden~="menubar"]) #toolbar-menubar{
  position: fixed;
  display: flex;
  top: 0px;
  height: var(--uc-menubar-height);
  width: 100%;
  overflow: hidden;
}
:root:not([sizemode="fullscreen"]) #toolbar-menubar.browser-toolbar > .titlebar-buttonbox-container{
  visibility: visible;
}
:root:not([chromehidden~="menubar"], [sizemode="fullscreen"]) #TabsToolbar#TabsToolbar#TabsToolbar > .titlebar-buttonbox-container {
  display: none !important;
}

 /*---------------------------------*/
/* 1. Force Tabs to Bottom */
#TabsToolbar {
  order: 100 !important;
}