Hello, in order to download MP3 from Youtube you need to install our program Ummy Video Downloader,
Also with the help of it you can download videos in high quality with sound: https://videodownloader.ummy.net

Hello! Our help will be more effective, if you copy and send us info about your browser and the Savefrom.Net extension:
http://en.savefrom.net/user.php?info=1
We'd also need some links you can't download (to test them).
For the better understanding it'll be great to see a screenshot with the error.
We are waiting for your reply, and thank you for contacting us Savefrom.net Team!

Hello, please, send us more details regarding the problem.

Hello, please, send us more details regarding the problem.

Hello, please give us more details.

Hello, Unfortunately, we don't fully understand you... please. provide us with more details regarding the issue.

For the better understanding it'll be great to see a screenshot with the error.

Здравствуйте, мы не совсем Вас понимаем, опишите Вашу проблему более подробней.

Hello, unfortunately we can not influence this, downloading is done directly from Youtube.
It is the site Youtube gives with this name.

Hello, we do not support this browser.

Hello, please, send us more details regarding the problem.