diff -r 000000000000 -r 6474c204b198 toolkit/themes/linux/global/scrollbox.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/themes/linux/global/scrollbox.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* 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/. */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+.autorepeatbutton-up > .autorepeatbutton-icon,
+.scrollbutton-up > .toolbarbutton-icon {
+  -moz-appearance: button-arrow-up;
+}
+
+.autorepeatbutton-down > .autorepeatbutton-icon,
+.scrollbutton-down > .toolbarbutton-icon {
+  -moz-appearance: button-arrow-down;
+}
+
+.autorepeatbutton-up[orient="horizontal"] > .autorepeatbutton-icon,
+.scrollbutton-up[orient="horizontal"] > .toolbarbutton-icon {
+  -moz-appearance: button-arrow-previous;
+}
+
+.autorepeatbutton-down[orient="horizontal"] > .autorepeatbutton-icon,
+.scrollbutton-down[orient="horizontal"] > .toolbarbutton-icon {
+  -moz-appearance: button-arrow-next;
+}
+
+:-moz-any(.scrollbutton-up, .scrollbutton-down) > .toolbarbutton-text {
+  display: none;
+}
+
+autorepeatbutton {
+  border: 1px solid ThreeDShadow;
+}