Firefox: firefox dies quietly. How to debug?

O. Hartmann ohartman at
Mon Sep 12 15:55:53 UTC 2016

Am Mon, 12 Sep 2016 16:54:50 +0200
Polytropon <freebsd at> schrieb:

> On Mon, 12 Sep 2016 16:26:45 +0200, O. Hartmann wrote:
> > The intention is to autologin a user and start via xinit a X11 session with
> > Firefox. So far. Autologin works, I can start the X11/wmaker session and also
> > open xterm, xpdf as clients. But I can not start firefox or libreoffice - they
> > die quietly. 
> > 
> > I do not see anything in the X11 logs nor do I see logs on the console telling
> > me something irregularyly has happened. I tried to look for some "verbosity"
> > flags on firefox, but I didn't find anything suitable.
> > 
> > Does someone here know how to make firefox a bit more verbose?  
> One of the easiest ways is to start Firefox from inside a
> regular X terminal (classic xterm program works fine) to
> capture possible text output (if nothing is logged in the
> file ~/.xsession-errors, or if there is "too much noise"
> inside that file to determine what messages belong to the
> Firefox startup process).

Firefox is started manually while I develop and configure, so I already have a xterm open
and start firefox from within. The curious thing is, that there is no ~/.xsession-errors
nor is there any other type of output (even no console, no /var/log/messages). 

> For a more verbose output, run "truss firefox" in xterm.
> This should provide you a good impression of what's happening.

I'll try this next time, thanks for the tipp. 

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