diff -r 000000000000 -r 6474c204b198 toolkit/themes/linux/global/splitter.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/themes/linux/global/splitter.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* 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/. */
+
+/* ===== splitter.css ===================================================
+  == Styles used by the XUL splitter element.
+  ======================================================================= */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* ::::: splitter (vertical) ::::: */
+
+splitter {
+  -moz-appearance: splitter;
+  -moz-box-align: center;
+  -moz-box-pack: center;
+  cursor: ew-resize;
+}
+
+splitter[state="collapsed"][collapse="before"],
+splitter[state="collapsed"][substate="before"],
+splitter[state="collapsed"][collapse="after"]:-moz-locale-dir(rtl),
+splitter[state="collapsed"][substate="after"]:-moz-locale-dir(rtl) {
+  cursor: e-resize;
+}
+
+splitter[state="collapsed"][collapse="after"],
+splitter[state="collapsed"][substate="after"],
+splitter[state="collapsed"][collapse="before"]:-moz-locale-dir(rtl),
+splitter[state="collapsed"][substate="before"]:-moz-locale-dir(rtl) {
+  cursor: w-resize;
+}
+
+/* ::::: splitter (horizontal) ::::: */
+
+splitter[orient="vertical"] {
+  cursor: ns-resize;
+}
+
+splitter[orient="vertical"][state="collapsed"][collapse="before"],
+splitter[orient="vertical"][state="collapsed"][substate="before"] {
+  cursor: s-resize;
+}
+
+splitter[orient="vertical"][state="collapsed"][collapse="after"],
+splitter[orient="vertical"][state="collapsed"][substate="after"] {
+  cursor: n-resize;
+}
+
+splitter[disabled="true"] {
+  cursor: default !important;
+}
+
+/* ::::: splitter grippy ::::: */
+
+grippy {
+  cursor: pointer;
+  min-width: 4px;
+  min-height: 115px;
+}
+
+splitter[orient="vertical"] > grippy {
+  min-width: 115px;
+  min-height: 4px;
+}