gecko/browser/metro/theme/start.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/. */

%filter substitution
%include defines.inc

/* Start UI ----------------------------------------------------------------- */

#startui-page {
  overflow-x: scroll;
  overflow-y: hidden;
  height: 100%;
}

#startui-page[viewstate="snapped"],
#startui-page[viewstate="portrait"] {
  overflow-x: hidden;
  overflow-y: scroll;
}

#startui-body {
  height: 100%;
  margin: 0;
}

#start-container {
  height: 100%;
}

#start-container[viewstate="snapped"],
#start-container[viewstate="portrait"] {
  width: 100%;
  max-width: 100%; /* ensure page doesn't expand, messing up @media rules */
  height: auto;
}

#start-container[viewstate="snapped"] .meta-section:not([expanded]) > richgrid {
  visibility: collapse;
}

/* Watermark */
#startui-body::after {
  content: '';
  width: 256px;
  height: 256px;
  position: fixed;
  left: 50%;
  top: 50%;
  margin-top: -128px;
  margin-left: -128px;
  z-index: -1;
  background-image: url("chrome://browser/skin/images/firefox-watermark.png");
  background-repeat: no-repeat;
  background-position: center center;
}