Mailvelope in firefox: "GnuPG is not available"

[Georgios <gpdsbe+debian@mailbox.org>]

Hi!

I'm running debian testing and I'm trying to use mailvelope with Firefox
in order to encrypt/sign my emails. I plan to use it with my yubikey.

I'm getting "GnuPG is not available". Any ideas how to solve it?

One solution i could try is downloading the packages from
https://www.gnupg.org/download/index.html and installing them.
The problem is that this option means i must manual update them.

I already tried putting a file called gpgmejson.json inside
/home/gpdsbe/.mozilla/native-messaging-hosts/

gpgmejson.json
{
    "name": "gpgmejson",
    "description": "Integration with GnuPG",
    "path": "/usr/bin/gpgme-json",
    "type": "stdio",
    "allowed_extensions": ["jid1-AQqSMBYb0a8ADg@jetpack"]
}


I'm thinking that the problem is that there is no gpgme-json.
Any ideas what package i should install?

Or any other solution?


Thanks in advance.