Firefox does not work with Firejail on Mint 20

[rpellew]

Hi
I just upgraded my system to Linux Mint 20.
Firefox no longer works with Firejail.
It appears to start, but nothing at all appears on the screen, and I have to manually kill the process.

firejail 0.9.62
firejail-profiles 0.9.62
firefox 78.0.1

If I comment out the seccomp lines in firefox-common.profile, it allows it to start. So I assume it is making some calls that need to be allowed. I don't know to find out. I have tried the --trace and --tracelog options but nothing appears in the syslog.

Thanks.

[rusty-snake]

AMD GPU? Add !kcmp.

I have tried the --trace and --tracelog options but nothing appears in the syslog.

They are for files (e.g. blacklist) and don't affect seccomp. For seccomp you need audit, see man 8 auditctl

[rpellew]

Hi rusty-snake
Yeah, AMD GPU. That fixed it.
Appreciate your help.

[rusty-snake]

This is caused by Mesa (see #3219 for more details) and fixed in the next release (#3301).