I'm using Firestarter on Ubuntu 12.04.
I configured Firestarter to run even after closing in the preferences menu.
But still it exits after closing.
It doesn't minimize to system tray.
A few things, and a recommendation.
First, Firestarter isnt the firewall itself. It is a graphical front-end to the
Secondly, this might be a bug in Firestarter itself, and you should file a bug as such.
Thirdly, Firestarter is not recommended for use anymore, due to it not having been updated in a while, since support for it has been dropped from Ubuntu developers. Therefore, it is more strongly recommended to use