Rated 3 out of 5 stars

It was working great but with TB it doesn't work. If you click send nothing happens. I had to disable this add-on to make it work.

This review is for a previous version of the add-on (1.2.0). 

Sorry, this is bug.
so, I fixed this bug and upload unofficial version.

confirm_address_121.xpi (beta)

I'm very happy if you try above .xpi.