Tor Browser hardening is not working (firejail)

I am trying to enable firejail hardening for Tor Browser (as described in the wiki - wiki/Tor_Browser#Harden_Tor_Browser > Firejail Confinement ), but got this error:

ERROR: Tor Browser ended with non-zero (error) exit code!

Tor Browser was started with:

firejail --whitelist=/home/user/.tb/tor-browser --private-etc=resolv.conf.kicksecure --profile=torbrowser-launcher --quiet /home/user/.tb/tor-browser/Browser/start-tor-browser --verbose --allow-remote 

Tor Browser exited with code: 1 

To see this for yourself, you could try: 
Start Menu -> System -> Xfce Terminal 
Then run: 
firejail --whitelist=/home/user/.tb/tor-browser --private-etc=resolv.conf.kicksecure --profile=torbrowser-launcher --quiet /home/user/.tb/tor-browser/Browser/start-tor-browser --verbose --allow-remote 

and then i am trying:

[workstation user ~]% cat /etc/torbrowser.d/50_user.conf # this file has been updated earlier, as described in the wiki

[workstation user ~]% firejail --whitelist=/home/user/.tb/tor-browser --private-etc=resolv.conf.kicksecure --profile=torbrowser-launcher --quiet /home/user/.tb/tor-browser/Browser/start-tor-browser --verbose --allow-remote
Error: no suitable /home/user/.tb/tor-browser/Browser/start-tor-browser executable found
zsh: exit 1     firejail --whitelist=/home/user/.tb/tor-browser  --profile=torbrowser-launcher

Please note that “normal” TOR Browser is working as expected, but I have to use firejail.

OS: latest Whonix workstation on VirtualBox

in this situation, how can i fix TOR Browser hardening when using firejail?

I removed firejail + Tor Browser documentation from the wiki just now.

Consider firewall support in tb-starter deprecated. It is now unsupported.

This was previously contributed by a contributor. Nowadays there is because there is no contributor maintaining it and I don’t have time for it.

This will remain unfixed until a new contributor starts maintaining it which is unlikely.

ok, thank you, we can close this topic