Comment 30 for bug 25830

mpt, what's the bug for the new "Unknown Type" dialog?

I've poked a bit and all that needs to happen to "view as text" is the following:

1) reset the mime type to text/plain in the MIMEInfo
2) reset the preferred handler to nsIMIMEInfo::handleInternally

both can be done from Javascript (it's a scriptable interface) so this can be
done in the dialog without too much trouble in my opinion...