On my Pi, cat /etc/xdg/lxsession/LXDE/autostart gives the following:
@lxpanel --profile LXDE @pcmanfm --desktop --profile LXDE @epiphany-browser http://localhost/ticker/start.py The graphical desktop launches, but the epiphany-browser does not start. How do I troubleshoot or where are all the places which can control what is launched automatically?