I have been using this extension for downloading available Douyin videos and it has been really handy. It is simple and lightweight. The Douyin video extension does what I need without a lot of extra settings.

The Douyin video detection is quick.

The one click download makes saving a Douyin video easy.

Far using the Douyin video extension has been a smooth experience and a useful little addition, to Firefox.

I think the Douyin video extension is definitely worth trying if you regularly use Douyin.