diff -r 000000000000 -r 6474c204b198 toolkit/themes/linux/global/toolbarbutton.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/themes/linux/global/toolbarbutton.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,115 @@
+/* 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/. */
+
+/* ===== toolbarbutton.css =====================================================
+  == Styles used by the XUL button element.
+  ======================================================================= */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* ::::: toolbarbutton ::::: */
+
+toolbarbutton {
+  -moz-appearance: toolbarbutton;
+  -moz-box-align: center;
+  -moz-box-pack: center;
+  margin: 0;
+  padding: 3px;
+  color: -moz-DialogText;
+}
+
+toolbarbutton:-moz-lwtheme {
+  text-shadow: none;
+}
+
+.toolbarbutton-icon[label]:not([label=""]),
+.toolbarbutton-icon[type="menu"] {
+  -moz-margin-end: 2px;
+}
+
+.toolbarbutton-text {
+  margin: 0 !important;
+  text-align: center;
+}
+
+toolbarbutton.tabbable {
+  -moz-user-focus: normal !important;
+}
+
+toolbarbutton:hover {
+  color: -moz-buttonhovertext;
+}
+
+toolbarbutton:hover:active,
+toolbarbutton[open="true"] {
+  padding-top: 4px;
+  padding-bottom: 2px;
+  -moz-padding-start: 4px;
+  -moz-padding-end: 2px;
+  color: ButtonText;
+}
+
+toolbarbutton[disabled="true"],
+toolbarbutton[disabled="true"]:hover,
+toolbarbutton[disabled="true"]:hover:active,
+toolbarbutton[disabled="true"][open="true"] {
+  padding: 3px;
+  color: GrayText;
+}
+
+toolbarbutton[checked="true"]:not(:hover) {
+  color: ButtonText;
+}
+
+toolbarbutton:-moz-lwtheme:not(:hover):not([checked="true"]):not([open="true"]):not([disabled="true"]) {
+  color: inherit;
+  text-shadow: inherit;
+}
+
+/* ::::: toolbarbutton menu ::::: */
+
+.toolbarbutton-menu-dropmarker {
+  -moz-appearance: toolbarbutton-dropdown !important;
+  list-style-image: none;
+  -moz-image-region: auto;
+  padding: 0;
+  margin: 0;
+}
+
+.toolbarbutton-menu-dropmarker[disabled="true"] {
+  padding: 0 !important;
+}
+
+/* ::::: toolbarbutton menu-button ::::: */
+
+toolbarbutton[type="menu-button"] {
+  -moz-box-align: stretch;
+  -moz-appearance: dualbutton;
+  -moz-box-orient: horizontal !important;
+}
+
+toolbarbutton[type="menu-button"],
+toolbarbutton[type="menu-button"]:hover,
+toolbarbutton[type="menu-button"]:hover:active,
+toolbarbutton[type="menu-button"][open="true"],
+toolbarbutton[type="menu-button"][disabled="true"],
+toolbarbutton[type="menu-button"][disabled="true"]:hover,
+toolbarbutton[type="menu-button"][disabled="true"]:hover:active {
+  padding: 0 !important;
+}
+
+.toolbarbutton-menubutton-button {
+  -moz-box-align: center;
+  -moz-box-pack: center;
+  -moz-box-orient: vertical;
+}
+
+/* .......... dropmarker .......... */
+
+.toolbarbutton-menubutton-dropmarker {
+  margin: 0 3px;
+  -moz-appearance: toolbarbutton-dropdown !important;
+  list-style-image: none;
+  -moz-image-region: auto;
+}