diff -r 000000000000 -r 6474c204b198 mobile/android/chrome/content/SelectHelper.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/chrome/content/SelectHelper.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,138 @@
+/* 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/. */
+"use strict";
+
+var SelectHelper = {
+  _uiBusy: false,
+
+  handleEvent: function(aEvent) {
+    this.handleClick(aEvent.target);
+  },
+
+  handleClick: function(aTarget) {
+    // if we're busy looking at a select we want to eat any clicks that
+    // come to us, but not to process them
+    if (this._uiBusy || !this._isMenu(aTarget) || aTarget.disabled)
+        return;
+
+    this._uiBusy = true;
+    this.show(aTarget);
+    this._uiBusy = false;
+  },
+
+  show: function(aElement) {
+    let list = this.getListForElement(aElement);
+
+    let p = new Prompt({
+      window: aElement.contentDocument
+    });
+
+    if (aElement.multiple) {
+      p.addButton({
+        label: Strings.browser.GetStringFromName("selectHelper.closeMultipleSelectDialog")
+      }).setMultiChoiceItems(list);
+    } else {
+      p.setSingleChoiceItems(list);
+    }
+
+    p.show((function(data) {
+      let selected = data.list;
+
+      if (aElement instanceof Ci.nsIDOMXULMenuListElement) {
+        if (aElement.selectedIndex != selected[0]) {
+          aElement.selectedIndex = selected[0];
+          this.fireOnCommand(aElement);
+        }
+      } else if (aElement instanceof HTMLSelectElement) {
+        let changed = false;
+        let i = 0;
+        this.forOptions(aElement, function(aNode) {
+          if (aNode.selected && selected.indexOf(i) == -1) {
+            changed = true;
+            aNode.selected = false;
+          } else if (!aNode.selected && selected.indexOf(i) != -1) {
+            changed = true;
+            aNode.selected = true;
+          }
+          i++;
+        });
+
+        if (changed)
+          this.fireOnChange(aElement);
+      }
+    }).bind(this));
+  },
+
+  _isMenu: function(aElement) {
+    return (aElement instanceof HTMLSelectElement ||
+            aElement instanceof Ci.nsIDOMXULMenuListElement);
+  },
+
+  getListForElement: function(aElement) {
+    let index = 0;
+    let items = [];
+    this.forOptions(aElement, function(aNode, aOptions, aParent) {
+      let item = {
+        label: aNode.text || aNode.label,
+        header: aOptions.isGroup,
+        disabled: aNode.disabled,
+        id: index,
+        selected: aNode.selected
+      }
+
+      if (aParent) {
+        item.child = true;
+        item.disabled = item.disabled || aParent.disabled;
+      }
+      items.push(item);
+
+      index++;
+    });
+    return items;
+  },
+
+  forOptions: function(aElement, aFunction, aParent = null) {
+    let element = aElement;
+    if (aElement instanceof Ci.nsIDOMXULMenuListElement)
+      element = aElement.menupopup;
+    let children = element.children;
+    let numChildren = children.length;
+
+    // if there are no children in this select, we add a dummy row so that at least something appears
+    if (numChildren == 0)
+      aFunction.call(this, { label: "" }, { isGroup: false }, aParent);
+
+    for (let i = 0; i < numChildren; i++) {
+      let child = children[i];
+      if (child instanceof HTMLOptionElement ||
+          child instanceof Ci.nsIDOMXULSelectControlItemElement) {
+        aFunction.call(this, child, { isGroup: false }, aParent);
+      } else if (child instanceof HTMLOptGroupElement) {
+        aFunction.call(this, child, { isGroup: true });
+        this.forOptions(child, aFunction, child);
+
+      }
+    }
+  },
+
+  fireOnChange: function(aElement) {
+    let evt = aElement.ownerDocument.createEvent("Events");
+    evt.initEvent("change", true, true, aElement.defaultView, 0,
+                  false, false,
+                  false, false, null);
+    setTimeout(function() {
+      aElement.dispatchEvent(evt);
+    }, 0);
+  },
+
+  fireOnCommand: function(aElement) {
+    let evt = aElement.ownerDocument.createEvent("XULCommandEvent");
+    evt.initCommandEvent("command", true, true, aElement.defaultView, 0,
+                  false, false,
+                  false, false, null);
+    setTimeout(function() {
+      aElement.dispatchEvent(evt);
+    }, 0);
+  }
+};