this post was submitted on 09 Jan 2026
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Does it have to be a Firefox extension? If not, I would use yt-dlp. It's open source and easy to use.
If you use Android, I recommend Seal. It uses
yt-dlpinternally, nicely packaged into an Android app.Unfortunately Seal has not had a release in over a year, since October 2024. It may still work but due to a recent (November 2025) change in yt-dlp an external JavaScript runtime is now required for full YouTube support.
There is YTDLnis as an alternative. It's on F-Droid but for some reason the page for it 404's (it's clearly there in my client though).
Ah, good to know.
I haven't downloaded anything from YouTube recently, but will switch to YTDLnis.
Thanks!
This is what I use. I use OpenWith extension to invoke yt-dlp from Firefox. This extension was abandoned in 2021 but it still works.