Comment 16 for bug 1593407

Hi AG-Ubrio, the profile that you should check is not the lightdm one, but this:

  /var/lib/snapd/apparmor/profiles/snap.firefox.firefox

It doesn't matter much, though, since this also has the rule

  /tmp/** mrwlkix,

Can you please check in the logs, if you get some apparmor denials when running firefox? You could run the command

    journalctl -f -t audit

then start firefox, and paste here the output from the first command. Also, if you say that the directory is created, it would be interesting to know what are its permissions.