Rated 5 out of 5 stars

I suppose the addon uses kdialog to send out notifications. But kdialog's --passivepopup option seems to be broken. At least in kubuntu jaunty with the ppa kde4.3 built.
Test it by calling "kdialog --passivepopup message_text 5".
Otherwise it's a really great addon to integrate firefox with kde4.

This review is for a previous version of the add-on (0.3.0).