[Users] firefox opens new copy of claws

Michael Schwendt bugs.michael at gmx.net
Mon Jan 6 15:16:49 CET 2020

On Mon, 6 Jan 2020 13:21:17 +0000, Dave Howorth wrote:

> > If you set $TMPDIR for your user, does that make a difference?
> Sorry I don't understand. I don't know what those tmpdirs are used for
> or their relevance to my problem, nor understand how to fix it. Sorry
> to be so ignorant.

Find some background in this old ticket about Fedora/Red Hat:

In the tmp directory, Claws Mail stores runtime files that are used to
detect an already running instance.

Basically, Claws Mail defaults to using /tmp based on what g_get_tmp_dir()
returns, if no environment variables have been customized. And Firefox
defaults to something else *and* may export that to the runtime environment
when launching Claws Mail, so where it would use /tmp by default, suddenly
it would use the different dir exported by Firefox. Boom!

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