Very good add-on for downloading videos over the net. However I'm concerned regarding the permission request it had during the installation process. Performance wise, downloads are fast and relatively error-free except for random cases where you intended to download one video while multiple tabs are open containing different videos, and it downloads with a specific file name of 1 video however, the content is from the other video. Perhaps this is a bug which will be fixed in future iterations of this add-on.

Overall great experience