i must admit this addon is a great one, almost everything works.
pretty good impression until i have read the comments about the adverts/adware. after a quick investigation, i decided to create an account to tell you guys what i have found so far.
i have not read the policies here so i cant comment it is legal or not, or whether the developer is right to do so. however IMHO it's better to inform the users about this before installing this addon
anyway, i think it's really a good addon and it's up to the users to install it or not.