Не работает.

Doesn't detect videos

No download button.

August 2, 2024: Doesn't work at all. Shows "Failed goooglevideo.com"

When dark mode is enabled on YouTube the Download button is practically invisible. Please fill it with white. Thank you!

Dec 13, 2020: Doesn't work at all, example : https://www.youtube.com/watch?v=4VsCVkt5k28 shows a waiting spinner indefinitely.

As others have reported, this no longer works and just shows a waiting spinner. This applies to Firefox 78.5ESR as well as 82 and is not fixed by downgrading the add-on (tried the last 2 and 0.2.9, which used yo work), so may be due to changes by YouTube. Please update to fix, thanks.

doesn't work now

Does not seem to function in Firefox 82.0.2. The download button appears beneath videos, but when clicked it's simply replaced by an endless spinning activity indicator, and fails to progress beyond that point.

not run in FF82.0.2 (64 bit)

Fantastic addon, but now not run in FF 82. I fixed problem removing 0.3.4 and installing version 0.3.3.
I hope addon will run in new FF Android version "Daylight" ( run in FF 68.X version, "Fennec")