Rated 4 out of 5 stars

Same with v5.7.26,all downloaded mp3 file gone.

This review is for a previous version of the add-on (5.7.27). 

Please contact us at cytsaver@hotmail.com with a link to the video you are having trouble with, thanks.

Rated 4 out of 5 stars

Wanna try v5.7.27,but Firefox prevent the install of this version.

This review is for a previous version of the add-on (5.7.26). 

v5.7.27 just passed review, you should be able to install it now.

Rated 3 out of 5 stars

All downloaded MP3 file disappeared. All gone,neither in default folder nor any other folder. I'm on Linux OS - openSUSE Tumbleweed,this is Firefox 50.0.

This review is for a previous version of the add-on (5.7.26). 

Please try v5.7.27:

https://addons.mozilla.org/en-US/firefox/addon/complete-youtube-saver/versions/

If it doesn't fix your problem, contact us at cytsaver@hotmail.com