I'm running xfce on Devuan Jessie.

When I start xfce, firefox autostarts.

This is annoying. I'll start firefox whn I want to see it.

I set the "session and startup" setting in firefox to "never".

But it keeps getting changed (I presume by firefox) to "If running".

This is obnoxious. Is there anything I can do about it?

-- hendrik