win 10 , firefox , flash can't open local file

I am  depressed for this problem.

In win 10(1511) ,Firefox(45) ,Can't flash has no response for  FileReference.browse().  File browse window does't show.

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

    xmlns:s="library://ns.adobe.com/flex/spark"

    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">

  <fx:Script>

  <![CDATA[

  protected function button1_clickHandler(event:MouseEvent):void

  {

  var f:FileReference=new FileReference();

  f.browse(); // no response.

  }

  ]]>

  </fx:Script>

  <fx:Declarations>

  <!-- 将非可视元素（例如服务、值对象）放在此处 -->

  </fx:Declarations>

  <s:Button click="button1_clickHandler(event)">

  </s:Button>

</s:Application>