diff -r 000000000000 -r 6474c204b198 browser/themes/osx/preferences/in-content/preferences.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/osx/preferences/in-content/preferences.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* - 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/. */
+
+%include ../../../shared/incontentprefs/preferences.css
+
+menulist:not([editable="true"]) > .menulist-dropmarker {
+  display: -moz-box;
+  margin-top: 1px;
+  margin-bottom: 1px;
+}
+
+checkbox:hover::before,
+checkbox[checked]::before {
+  -moz-margin-end: -20px;
+  -moz-margin-start: 5px;
+}
+
+radio:hover::before,
+radio[selected]::before {
+  -moz-margin-end: -18px;
+  -moz-margin-start: 7px;
+}
+
+.numberbox-input-box {
+  -moz-appearance: none;
+  border-width: 0;
+}
+
+spinbuttons {
+  -moz-appearance: none;
+}
+
+.spinbuttons-up {
+  margin-top: 0 !important;
+  border-radius: 4px 4px 0 0;
+}
+
+.spinbuttons-down  {
+  margin-bottom: 0 !important;
+  border-radius: 0 0 4px 4px;
+}
+
+.spinbuttons-button > .button-box {
+  -moz-padding-start: 2px !important;
+  -moz-padding-end: 3px !important;
+}
+
+.spinbuttons-button > .button-box > .button-text {
+  display: none;
+}
+
+.actionsMenu > .menulist-label-box > .menulist-icon {
+  margin-top: 2px;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 8px !important;
+}
+
+description {
+  font-size: 1.25rem;
+  line-height: 22px;
+}