This is the case of virtualbox running in firejail. I can understand it tries to read kernel/hw modules used but what business is it of virtualbox reading the users of the host system or what processes are running beside it? I don't know that much, I wonder and get paranoid easily, but I thought it might be of interest. Some browsers (like chrome forks) don't like running inside firejail, most mozilla ones do. If you check with pstree chrome-forks (and I assume chromium itself) seem to be running outside the X jail, as a separate root process. Mozilla based stuff run within the x-session.
With firejail, from within the software, the default read/write directory is ~/Downloads but you can configure what you like. If you need to read or write outside the jail you are out of luck, but you can move stuff in out from Downloads.
Although dbus is not running, it gets all those access tries denied, it still functions well, which is even more of a source of wondering why is it collecting so much "unneeded" data from your system.
Here is the terminal output if someone is interested:

% firejail virtualbox                     
Reading profile /etc/firejail/virtualbox.profile
Reading profile /etc/firejail/disable-common.inc
Reading profile /etc/firejail/disable-devel.inc
Reading profile /etc/firejail/disable-exec.inc
Reading profile /etc/firejail/disable-interpreters.inc
Reading profile /etc/firejail/disable-passwdmgr.inc
Reading profile /etc/firejail/disable-programs.inc
Reading profile /etc/firejail/disable-xdg.inc
Reading profile /etc/firejail/whitelist-common.inc
Reading profile /etc/firejail/whitelist-runuser-common.inc
Reading profile /etc/firejail/whitelist-usr-share-common.inc
Reading profile /etc/firejail/whitelist-var-common.inc
Parent pid 22708, child pid 22709
Warning: An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set.
Warning: skipping crypto-policies for private /etc
Warning: skipping pki for private /etc
Private /etc installed in 380.57 ms
Warning: /sbin directory link was not blacklisted
Warning: /usr/sbin directory link was not blacklisted
Blacklist violations are logged to syslog
Child process initialized in 546.29 ms
libkmod: kmod_module_get_holders: could not open '/sys/module/cfg80211/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/8021q/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/garp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mrp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/stp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/llc/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_codec_hdmi/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/joydev/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mousedev/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_codec_realtek/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/input_leds/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_codec_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ledtrig_audio/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/i915/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_rapl_msr/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_rapl_common/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/x86_pkg_temp_thermal/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_powerclamp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/coretemp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/kvm_intel/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/i2c_algo_bit/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/iTCO_wdt/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mei_wdt/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mei_hdcp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/kvm/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/dcdbas/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/iTCO_vendor_support/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/drm_kms_helper/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/cec/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/irqbypass/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/rc_core/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/drm/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crct10dif_pclmul/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_intel/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crc32_pclmul/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ghash_clmulni_intel/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_intel_dspcfg/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/aesni_intel/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_codec/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_gtt/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/agpgart/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crypto_simd/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hda_core/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/syscopyarea/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/cryptd/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/sysfillrect/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/glue_helper/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_hwdep/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/sysimgblt/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/fb_sys_fops/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/e1000e/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mei_me/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/rapl/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_pcm/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/lpc_ich/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/evdev/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ie31200_edac/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mei/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mac_hid/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/i2c_i801/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_cstate/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/pcspkr/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/intel_uncore/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/btrfs/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/blake2b_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/xor/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vboxnetflt/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vboxnetadp/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vboxdrv/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/sg/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/hci_vhci/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/bluetooth/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vhost_vsock/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/raid6_pq/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vhost_net/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vmw_vsock_virtio_transport_common/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ecdh_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ecc/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vhost/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vsock/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/rfkill/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/tap/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/libcrc32c/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_seq/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vfio_iommu_type1/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/uhid/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/userio/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vhost_iotlb/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/dm_mod/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/vfio/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/nvram/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/tun/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_seq_device/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/serio/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/uinput/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ppp_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/slhc/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/loop/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd_timer/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/snd/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/cuse/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/soundcore/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/fuse/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ext4/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crc32c_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crc16/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/mbcache/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/jbd2/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/sr_mod/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/cdrom/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/hid_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ata_generic/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/usbhid/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/pata_acpi/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/hid/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/xhci_pci/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/xhci_hcd/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ehci_pci/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/crc32c_intel/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ehci_hcd/holders': Permission denied
libkmod: kmod_module_get_holders: could not open '/sys/module/ata_piix/holders': Permission denied
whoami: cannot find name for user ID 1000: No such file or directory
error: list of real users must follow -U

Usage:
 ps [options]

 Try 'ps --help <simple|list|output|threads|misc|all>'
  or 'ps --help <s|l|o|t|m|a>'
 for additional help text.

For more details see ps(1).
Qt WARNING: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-'

Parent is shutting down, bye...

Thanks firejail