ParrotOS have made a lot of progress in making firejail a general usable solution out of the box while supporting a ton of programs and surviving upgrades. This ticket is for taking advantage of their code and merging it in our distro.
https://forums.whonix.org/t/install-firejail-firetools-by-default/5363/4
https://forums.whonix.org/t/check-parrot-os-sandboxing-code/5361/5
https://forums.whonix.org/t/firejail-seccomp-more-options-for-program-containment/1030/65