sane-urlbar-userChrome.css

#urlbar[breakout-extend] {
  top: calc(
    (var(--urlbar-toolbar-height) - var(--urlbar-height)) / 2
  ) !important;
  left: calc(
    (var(--urlbar-toolbar-width) - var(--urlbar-width)) / 2
  ) !important;
  width: 100% !important;
}

#urlbar[breakout-extend] #urlbar-input-container {
  height: var(--urlbar-height) !important;
  padding: 0 !important;
}

.urlbarView {
  margin: 0 !important;
  width: 100% !important;
}

.urlbarView-row {
  padding: 0 !important;
}

.urlbarView-row:first-of-type {
  display: none !important;
}

#urlbar .search-one-offs {
  display: none !important;
}

#urlbar[breakout][breakout-extend] > #urlbar-background {
  animation: none !important;
  box-shadow: none !important;
}