Dear Maintainer,

Since jspdf was apparently split out of the iceweasel package, some of
the PDF viewing UI appears, but it's not apparent to the user why the
actual PDF viewer does not work. As a result, it'd be nice if any
informative error message appeared in that case. In addition, to prevent
this issue from the get-go, it'd be nice if xul-ext-jspdf could be
suggested (or even recommended) by Iceweasel.

Thanks for the fantastic job you're doing packaging Firefox for Debian!
Andreas