To uninstall xfireworks just follow these instructions.
sudo apt-get remove xfireworks
This will remove just the xfireworks package itself.
sudo apt-get remove --auto-remove xfireworks
This will remove the xfireworks package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xfireworks then this will work.
sudo apt-get purge xfireworks
Or similarly, like this xfireworks
sudo apt-get purge --auto-remove xfireworks
|Maintainer||Yukiharu YABUKI <email@example.com>|
|Description||Fireworks in your root window This is imitation of Japanese "Hanabi Taikai". It is very popular event in Japanese summer and performed on some rivers.|