diff -r 000000000000 -r 6474c204b198 toolkit/themes/osx/global/commonDialog.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/themes/osx/global/commonDialog.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+/* 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/. */
+
+#commonDialog {
+  line-height: 13px;
+}
+
+#filler {
+  margin: 0px -14px;
+}
+
+#infoContainer {
+  max-width: 33em;
+}
+
+#loginContainer {
+  padding-top: 10px;
+}
+
+#info\.icon {
+  -moz-margin-end: 14px;
+}
+
+#info\.title,
+#info\.header,
+#info\.body {
+  font: menu;
+  line-height: 16px;
+  margin-bottom: 6px;
+}
+
+#info\.title {
+  font-weight: bold;
+}