Install fbautostart by entering the following commands in the terminal:
sudo apt update sudo apt install fbautostart
Description:
XDG compliant autostarting app for Fluxbox
The fbautostart app was designed to have little to no overhead, while still maintaining the needed functionality of launching applications according to the XDG spec. . This package contains support for GNOME and KDE.
Homepage: https://launchpad.net/fbautostart
Version: 2.718281828-1build1
Section: universe/misc