It requires an external program to work, but once you have it it does work for otherwise undownloadable files. It is here filecxx;com/en_US/index;html

相见恨晚啊，好用

非常好用，我爱用！

Good, i can easily download video with this extension! Thanks for supporting me!

好用，替代了IDM
唯一不足是不支持按文件类型保存到不同路径

Awesome

感谢这么快就发布新版了，我报的bug消除了，五星好评！

先给个好评,感谢开发者

能否完全不让firefox自带的下载管理器弹出，类似fdm的扩展