This doesn't work right. (screenshot)

[Jdbye]

I have had this installed for a long time, and it has never worked right for me. Any time I try to use it, I get this message, and as far as I can tell this is because Google has an option enabled to disallow iframe embedding:

I see that opening in a new tab is an option and that seems to work, but why is opening it in an iframe even an option, if it doesn't work?