gecko-dev/mobile/android/themes/core/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/. */

html {
  font-size: 24px;
}

input,
button {
  font-size: 28px;
  padding: 5px;
}

#filter-container {
  display: -moz-box;
  -moz-box-align: center;
}

#new-pref-container {
  margin: 10px 0;
}

.pref-item {
  padding-top: 10px;
  border-top: 1px solid #ccc;
}

.pref-item[default="false"] {
  font-weight: bold;
}

.pref-item > * {
  margin-bottom: 10px;
}

.modify-pref-button {
  margin-right: 10px;
}