diff -r 000000000000 -r 6474c204b198 browser/themes/linux/aboutSessionRestore.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/linux/aboutSessionRestore.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,85 @@
+%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
+
+html {
+  height: 100%;
+}
+
+body {
+  height: 100%;
+  text-align: center;
+}
+
+#errorPageContainer {
+  background-image: url("moz-icon://stock/gtk-dialog-warning?size=dialog");
+  display: -moz-box;
+  width: -moz-available;
+  height: 70%;
+  -moz-box-orient: vertical;
+  text-align: start;
+}
+
+#errorShortDesc > p {
+  margin-top: 0.4em;
+  margin-bottom: 0;
+}
+
+#errorLongContent, #errorTrailerDesc {
+  display: -moz-box;
+  -moz-box-flex: 1;
+  -moz-box-orient: vertical;
+}
+
+#tabList {
+  margin-top: 2.5em;
+  width: 100%;
+  min-height: 12em;
+}
+
+treechildren::-moz-tree-image(icon),
+treechildren::-moz-tree-image(noicon) {
+  padding-right: 2px;
+  margin: 0px 2px;
+  width: 16px;
+  height: 16px;
+}
+
+treechildren::-moz-tree-image(noicon) {
+  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
+}
+treechildren::-moz-tree-image(container, noicon) {
+  list-style-image: url("chrome://browser/skin/aboutSessionRestore-window-icon.png");
+}
+treechildren::-moz-tree-image(checked) {
+  list-style-image: url("chrome://global/skin/checkbox/cbox-check.gif");
+}
+treechildren::-moz-tree-image(partial) {
+  list-style-image: url("chrome://global/skin/checkbox/cbox-check-dis.gif");
+}
+
+/* undo odd row highlighting from tree.css */
+treechildren::-moz-tree-row(odd) {
+  background-color: transparent;
+}
+treechildren::-moz-tree-row(odd, selected, focus) {
+  background-color: Highlight;
+}
+
+/* highlight "windows" instead */
+treechildren::-moz-tree-row(alternate) {
+  background-color: -moz-oddtreerow;
+}
+treechildren::-moz-tree-row(alternate, selected) {
+  background-color: Highlight;
+}
+
+#buttons {
+  -moz-margin-start: 80px; /* same as #errorLongContent in netError.css */
+}
+#buttons > button {
+  margin-top: 2em;
+  -moz-margin-start: 5px;
+}