gecko-dev/browser/themes/osx/aboutPrivateBrowsing.css

%if 0
/* 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/. */
%endif

body.private > #errorPageContainer {
  background-image: url("chrome://browser/skin/Privacy-48.png");
}

body.normal > #errorPageContainer {
  background-image: url("chrome://global/skin/icons/question-64.png");
}

#clearRecentHistoryDesc {
  margin-top: 2em;
}

#clearRecentHistoryDesc > p {
  font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
}

#startPrivateBrowsingDesc > button {
  -moz-margin-start: 0;
}

#footerDesc > p {
  font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
}

#moreInfo {
  font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
  -moz-padding-start: 25px;
  background: url("chrome://global/skin/icons/information-16.png") no-repeat top left;
}

#moreInfo:-moz-dir(rtl) {
  background-position: top right;
}

#moreInfoText {
  margin-bottom: 0;
}

#moreInfoLinkContainer {
  margin-top: 0.5em;
}