View/Print as PDF integration window

One of our programmers used an add-on to allow a user to view/print documents as a PDF.

I have attached a file as a .jpg showing the add-in. Does anyone know what the name of the add-in is?

Second questions. I can the add-on in one area of my site and not in the other area of the site.

In FF I cannot see the add-in on any page that calls it.

I do not know if it is a programming issue, a browser issue or my machine configuration issue.

If I knew the name of the add-in maybe I can search the net and figure it out.

Thank you.