给chrome插件市场页面添加一个下载crx文件的按钮
由于Chrome浏览器屏蔽了Chrome webstore 页面下的所有插件,所以此脚本并不能在chrome浏览器下正常工作,使用firefox安装此脚本可以正常工作.
Since the Chrome browser blocks all plug-ins under the Chrome webstore page, this script does not work properly under the chrome browser. Installing this script with firefox can work well.
