I have donated twice to get Pro status so I can download YouTube videos as mp3 audio files. Twice now I have suddenly lost this status and for a second time, I can't download videos as mp3 files.

Apparently, this was due to me uninstalling and reinstalling Firefox after it crashed. It seems that this extension depends upon the user not deleting cookies, whether on purpose or by accident. I won't donate again because I do occasionally clean out browser cookies.

Other than the undependability of the Pro status, it does a good job downloading video file formats.