gecko-dev/browser/metro/theme/config.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

@media (max-width: 499px) {
  #editor-container > hbox {
    -moz-box-orient: vertical;
  }
}

richlistitem {
  -moz-box-align: center;
}

richlistitem .preferences-title {
  pointer-events: none;
  min-width: 200px;
  -moz-box-flex: 1;
  margin-right: 8px;
}

/* XXX look  + sync */
richlistitem[default="false"] .preferences-title {
  font-weight: bold;
}

richlistitem .preferences-value {
  min-width: 200px;
  pointer-events: none;
  -moz-box-flex: 4;
  text-align: end;
  color: grey;
}

/* Editor */
#editor-row {
  padding: 0;
  background: #E9E9E9;
}

#editor {
  border-bottom: 1px solid rgb(207,207,207);
}

#editor > hbox > #editor-name,
#editor > hbox > #editor-cancel,
#editor > hbox > #editor-done {
  display: none;
}

#editor-container > #editor > hbox > #editor-name,
#editor-container > #editor > hbox > #editor-cancel,
#editor-container > #editor > hbox > #editor-done {
  display: -moz-box;
}

#editor-container > #editor > hbox > #editor-reset {
  display: none;
}

#editor-container > hbox > label {
  pointer-events: none;
  color: black;
}

#editor + richlistitem {
  display: none;
}

#editor[default="false"] .preferences-title {
  font-weight: bold;
}

#editor-setting setting {
  border-color: transparent !important;
}

#editor-setting[type="string"] .setting-input {
  -moz-box-flex: 4;
}

#editor-setting[type="string"] .setting-input > textbox {
  -moz-box-flex: 1;
}

/* bug 647650: keep 'text-align: right' here instead of using start/end since 
 * the field should looks like ltr as much as possible
 */
#editor-setting[type="string"] .setting-input > textbox:-moz-locale-dir(rtl) {
  direction: ltr;
  text-align: right;
}

#editor-buttons {
  margin: 2px;
}