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

.app:active {
  background-color: #febc2b;
}

#header-button {
  background-image: url("chrome://browser/skin/images/marketplace-logo.png"), url("chrome://browser/skin/images/chevron.png");
  background-size: 32px 32px, 8px 20px;
  background-position: left, right 0.5em center;
  -moz-padding-start: 2.5em;
}

#main-container {
  padding: 2em;
  background-color: #EEF2F5;
  border-bottom: 1px solid #BAC2AC;
}

.hidden {
  display: none;
}

.spacer {
  clear: both;
}

.app {
  float: left;
  cursor: pointer;
  text-align: center;
  margin: 1em;
  width: 5.6em;
  height: 6.7em;
  font-size: .8em;
  background-color: transparent;
  border: none;
}

.app img {
  width: 5em;
  height: 5em;
  pointer-events: none;
}

.app div {
  pointer-events: none;
}