Comment 1 for bug 1197783

Confirmed. In our analysis, the callback function is stored in the DOM on an iframe element. However, this iframe element is also the target of the snippet of javascript that retrieves the callback function and calls it. In Firefox 22, when the snippet is loaded into the iframe, the iframe element no longer contains the callback. Additionally, the error message that is supposed to indicate this to the user does not function properly.

We have an ugly, 2 line proof of concept fix that stores the callback function in another place. Hopefully we will have an acceptable solution later today.