scute / firefox: cannot connect to GPG agent

[Fabian Peter Hammerle]

Hi,

I am trying to setup Scute (http://scute.org/) so I can use my
authentication subkey for client authentication in Firefox.

I followed the steps in Scute's manual to setup Firefox.
http://scute.org/scute.html/Application-Configuration.html

My problem is that I keep getting these warnings whenever I launch
Firefox:
> scute: agent_connect: cannot connect to GPG agent: IPC connect call failed
> scute: scute_gpg_err_to_ck: Error occurred: No agent running (Unspecified source)

As far as I understand gpg-agent is running.

After reading http://scute.org/scute.html/Troubleshooting.html
I noticed that $GPG_AGENT_INFO was not set.

However, setting the path manually did not solve the problem:
$ gpgconf --list-dir agent-socket
> /run/user/1000/gnupg/S.gpg-agent
$ GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent firefox
> scute: agent_connect: cannot connect to GPG agent: IPC connect call failed
> scute: scute_gpg_err_to_ck: Error occurred: No agent running (Unspecified source
> [...]

Any ideas?

$ apt-cache policy scute | grep -i installed
> Installed: 1.5.0+git20151221.dc22111-2
$ gpg-agent --version | head -n 2
> gpg-agent (GnuPG) 2.1.18
> libgcrypt 1.7.6

Fabian
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