I have tried a few different apps. This is by far the easiest and most simplest to use. Easy to install. Never had an issue with it. Great job to the developer :) I Note that as of the last Firefox update 88.0.1 that the download button has disappeared.... so something has changed somewhere within Firefox itself..... I see a lot of comments.... BE patient people Dishita will get it sorted.

This is the great add-on I've ever had. I've downloaded many add-ons and removed them after using for 2-3 hours. But this add-on doesn't be like that. I'd like to say this is only add-on I've on my computer haha. When I have any problems and report to the dev, she always fixes it ASAP. Thank you so much about this helpful add-on.

Excellent support solid performance the best add on for quality downloads. Thank you for this great add on.

Es una magnifico complemento . En lo personal me agrada mucho que el botón de descarga sea muy discreto. Al principio cuando la descargué y apareció el mensaje de pago por la conversión 720p y 1080p quedé un poco decepcionado, pero decidí realizar el pago (que en realidad es una donación ) y la verdad ha valido cada peso pagado (en mi caso soy un usuario al que no le gusta ver sus videos favoritos de YT desaparecer por lo que me gusta tenerlos guardados en mi PC). Por lo eficiente del complemento y por lo accesible que es la cuenta Pro mi calificación es 5 estrellas

goood yotube downloader ever.. thanks

WOW. Just keep at it, this works wonders.

GoooooooooooooooooooooD

this has been kept functional for many years. it stops working occasionally, but it always comes back. thanks so much!

There's only one person working on this, and they work very diligently to update the code to keep it working. If you're worried about the download not working please be patient, the dev has to consistently update it because youtube keeps trying to block downloading services like this one. Overall this addon works good and I reccommend donating.
The only complaint I have is, why does the addon need permissions to "Access your data for ALL websites"?