Firefox and thunderbird are starting as root

[Lemnis-kate]

Dear people.

With Ubuntu Mate 16.04 the command "firejail firefox &" starts firefox als root.
This could not be right. With thunderbird I have the same problem.
So it can't be the profile.
With Ubuntu 16.04. that problem doesn't exists.

Thanks for help.

[Fred-Barclay]

Hi @Lemnis-kate,
Firejail does start itself as root, but it drops these privileges when running Firefox or other applications. You can check this for yourself by running ps -aux | grep firefox inside your terminal.

A more detailed explanation is at https://firejail.wordpress.com/support/frequently-asked-questions/#as-superuser. We also have a discussion about it at #258.

EDIT: as you noticed, the notice that programs are running as root usually only occurs in MATE, as far as I'm aware. That's why you see it in Ubuntu MATE 16.04 but not in regular Ubuntu.