Various sites being tuned for completly different levels of volume was the reason I searched for an extension such as this. It does its work somewhat in this use case but imo it needs to localy remember the volume for each site and not just reset it. I always set my comfortable volume just to be blasted the next time. I understand this might not be the intended use and would be happy to fork this add-on and try to implement it myself. Still thanks for your effort :)