I just saw this app on my computer... And yes, an alert, message, something would be great before installing new stuff, but also I don't see this as a big problem.
Yes, maybe it's not an ethical move to install new apps on users's PCs, but it's not a virus, it's not something bad, and it's actually an addon to a program you already accepted to install.
Even more, a free program. All apps must be secure and help users, but we can't really complain about looks, a free and safe addon, and more.