Ive got a problem with firejail. In principle this sandbox works quite well. I can start a browser (firefox/midori) and other applications as well (like rhythmbox). What I want to do now is use the overlay-functionality: firejail --overlay firefox. Yet that doesnt work.Firefox itself produces the following message: Your Firefox profile cannot be loaded. It may be missing or inaccessible. Yet that cant be. Without firejail theres no problem and even firejail firefox works well. The following message is taken from the terminal:rosika@rosika-Lenovo-H520e ~> firejail --overlay firefoxReading profile /etc/firejail/firefox.profileReading profile /etc/firejail/disable-mgmt.incReading profile /etc/firejail/disable-secret.incReading profile /etc/firejail/disable-common.incReading profile /etc/firejail/disable-devel.incReading profile /etc/firejail/whitelist-common.incWarning: --overlay and --noroot are mutually exclusive, noroot disabledParent pid 2362, child pid 2363OverlayFS configured in /home/rosika/.firejail/2362 directoryWarning: cannot find home directory****** Warning: cannot whitelist Downloads directory***     Any file saved will be lost when the sandbox is closed.***     Please create a proper Downloads directory for your application.***Blacklist violations are logged to syslogWarning: failed to unmount /sysparent is shutting down, bye.As far as I know --overlay has been working as of kernel version 3.18. As I have 4.4.0-45-generic x86_64 there shouldnt be any problems. Can anyone help me? Thanks a lot in advance. RosikaP.S.: System: Linux/Lubuntu 16.04 LTS (64 bit)
sandbox firejail --overlay
lubuntu;sandbox