Have been using this app for occasional higher quality downloads for years. Recently had some difficulty enabling the PRO features, but the developer quickly responded to help me solve the problem.

the pro version works very well

Easy to use, great tool.

为什么下载时候的文件名，和视频不一致

I love this plug-in extension add-on. Though it has not work for me as of late. Probably due to Youtube updates against Firefox's own updates. Hopefully the creator of this app can resolve this!!