window[active="true"]:-moz-system-metric(windows-default-theme)
{
  background-color: #b9d1ea;
}
window:not([active="true"]):-moz-system-metric(windows-default-theme)
{
  background-color: #d7e4f2;
}

window:not(:-moz-system-metric(windows-default-theme))
{
  background-color: -moz-Dialog;
}

window:-moz-system-metric(windows-compositor) {
  background: transparent !important;
  -moz-appearance: -moz-win-glass;
}

.nonglass
{
  background: blue;
  /*opacity: 0.99;*/
}

.greenbg
{
  background: green;
  height: 50px;
}

hbox.glass
{
  background: transparent;
}

.greenbg > * {
  color: white;
}

#nc:-moz-system-metric(windows-compositor)
{
  display: none;
}

#c:not(:-moz-system-metric(windows-compositor))
{
  display: none;
}