diff -r 000000000000 -r 6474c204b198 toolkit/content/widgets/spinbuttons.xml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/content/widgets/spinbuttons.xml	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,96 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- 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/. -->
+
+<bindings id="spinbuttonsBindings"
+   xmlns="http://www.mozilla.org/xbl"
+   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+   xmlns:xbl="http://www.mozilla.org/xbl">
+
+  <binding id="spinbuttons"
+           extends="chrome://global/content/bindings/general.xml#basecontrol">
+
+    <resources>
+      <stylesheet src="chrome://global/skin/spinbuttons.css"/>
+    </resources>
+
+    <content>
+      <xul:vbox class="spinbuttons-box" flex="1">
+        <xul:button anonid="increaseButton" type="repeat" flex="1"
+                    class="spinbuttons-button spinbuttons-up"
+                    xbl:inherits="disabled,disabled=increasedisabled"/>
+        <xul:button anonid="decreaseButton" type="repeat" flex="1"
+                    class="spinbuttons-button spinbuttons-down"
+                    xbl:inherits="disabled,disabled=decreasedisabled"/>
+      </xul:vbox>
+    </content>
+
+    <implementation>
+      <property name="_increaseButton" readonly="true">
+        <getter>
+          return document.getAnonymousElementByAttribute(this, "anonid", "increaseButton");
+        </getter>
+      </property>
+      <property name="_decreaseButton" readonly="true">
+        <getter>
+          return document.getAnonymousElementByAttribute(this, "anonid", "decreaseButton");
+        </getter>
+      </property>
+
+      <property name="increaseDisabled"
+                onget="return this._increaseButton.getAttribute('disabled') == 'true';"
+                onset="if (val) this._increaseButton.setAttribute('disabled', 'true');
+                       else this._increaseButton.removeAttribute('disabled'); return val;"/>
+      <property name="decreaseDisabled"
+                onget="return this._decreaseButton.getAttribute('disabled') == 'true';"
+                onset="if (val) this._decreaseButton.setAttribute('disabled', 'true');
+                       else this._decreaseButton.removeAttribute('disabled'); return val;"/>
+    </implementation>
+
+    <handlers>
+      <handler event="mousedown">
+        <![CDATA[
+          // on the Mac, the native theme draws the spinbutton as a single widget
+          // so a state attribute is set based on where the mouse button was pressed
+          if (event.originalTarget == this._increaseButton)
+            this.setAttribute("state", "up");
+          else if (event.originalTarget == this._decreaseButton)
+            this.setAttribute("state", "down");
+        ]]>
+      </handler>
+      
+      <handler event="mouseup">
+        this.removeAttribute("state");
+      </handler>
+      <handler event="mouseout">
+        this.removeAttribute("state");
+      </handler>
+
+      <handler event="command">
+        <![CDATA[
+          var eventname;
+          if (event.originalTarget == this._increaseButton)
+            eventname = "up";
+          else if (event.originalTarget == this._decreaseButton)
+            eventname = "down";
+
+          var evt = document.createEvent("Events");
+          evt.initEvent(eventname, true, true);
+          var cancel = this.dispatchEvent(evt);
+          
+          if (this.hasAttribute("on" + eventname)) {
+            var fn = new Function("event", this.getAttribute("on" + eventname));
+            if (fn.call(this, event) == false)
+              cancel = true;
+          }
+
+          return !cancel;
+        ]]>
+      </handler>
+
+    </handlers>
+  </binding>
+
+</bindings>