[Qt-interest] Debug NPAPI Plugin

[Robin]

Hi,

I am trying to build a browser plugin for at least all browsers
supporting the NPAPI.
The major part works fine, but there are some bugs which I am unable to fix.
Could somebody please give me a hint how to debug such a plugin within a
running
Firefox instance? The debug version of Firefox seems not to be very helpful.
I think there must be a way using the Qt-Creator, but I couldn't find a
working one.

Thanks in anticipation, Robin