Very good, the author is constantly trying to keep up with YT who change their format regularly to prevent the app working.

Of the few Firefox YouTube downloader addons that work, this is by far the best – it is reliable, easy to use, offers a choice of file sizes to download the video and does it at a good speed.

Very Good

An excellent add-on for downloading YouTube videos. This software is always up-to-date. Thank you.

it is good plugin

Very convenient. Add-on is actively maintained by the developer.

Works really well with all types of videos on YT. Very handy to have, really. Quick response from developers when something does get broken (YT changes encryption, for example). Thank you!

Great extension. I use it to download tutorials in 720p quality, so I can play them offline - which is much faster for scrubbing timeline than online streamed videos.

I've tried many youtube download extensions and this is the best. I think it's worth donating a few dollars to the plugin author, since it does require work to keep up with code changes on Youtube's side. If I ever need 1080p downloads, I will happily buy the pro version.

Developer is actively working on improvements and i look forward to its full integration

Works well, simple & convinient to use, great tech support.

easy to use and rarely fails

works great and updates regularly...Peace