Comment 1 for bug 659288

yes, looks like the old fwbuilder (3.0.7) on Maverick is broken. There is no reaction to double click on objects in the tree at all, which is weird. This could be caused by upgrade of Qt to 4.7.0 in Maverick but I can't be sure.

This could be difficult to fix, this being an old version and Ubuntu's strict policy regarding updates for released distributions (https://wiki.ubuntu.com/StableReleaseUpdates). v3.0.7 is very outdated anyway, I suggest you upgrade to the latest fwbuilder 4.1.2 using our repository:

http://www.fwbuilder.org/4.0/docs/firewall_builder_packages.html

Vadim Kurland
Firewall Builder project