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[GH-ISSUE #3837] firefox: firefox -p fails to launch (seccomp) #2414

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opened 2026-05-05 09:05:29 -06:00 by gitea-mirror · 9 comments
gitea-mirror commented 2026-05-05 09:05:29 -06:00
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Originally created by @EauBureau on GitHub (Dec 18, 2020).
Original GitHub issue: https://github.com/netblue30/firejail/issues/3837

Since upgrading to Firefox 84 it no longer launches using $ fireljail firefox -p
Firefox's profile selector window is supposed to open.

Using $ firejail firefox does work. i.e Firefox opens and runs without profile selector option.

Using $ firefox -p does work. i.e. without firejail the profile selector window appears

Ubuntu 20.04 LTS
firejail version 0.9.62

$ firejail firefox -p
Reading profile /etc/firejail/firefox.profile
Reading profile /etc/firejail/whitelist-usr-share-common.inc
Reading profile /etc/firejail/firefox-common.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-programs.inc
Reading profile /etc/firejail/whitelist-common.inc
Reading profile /etc/firejail/whitelist-var-common.inc
Warning: networking feature is disabled in Firejail configuration file
Parent pid 2676591, child pid 2676592
Warning: An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set.
Post-exec seccomp protector enabled
Seccomp list in: !chroot, check list: @default-keep, prelist: unknown,
Child process initialized in 73.01 ms
Originally created by @EauBureau on GitHub (Dec 18, 2020). Original GitHub issue: https://github.com/netblue30/firejail/issues/3837 Since upgrading to Firefox 84 it no longer launches using `$ fireljail firefox -p` Firefox's profile selector window is supposed to open. Using `$ firejail firefox` does work. i.e Firefox opens and runs without profile selector option. Using `$ firefox -p` does work. i.e. without firejail the profile selector window appears Ubuntu 20.04 LTS firejail version 0.9.62 ``` $ firejail firefox -p Reading profile /etc/firejail/firefox.profile Reading profile /etc/firejail/whitelist-usr-share-common.inc Reading profile /etc/firejail/firefox-common.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-programs.inc Reading profile /etc/firejail/whitelist-common.inc Reading profile /etc/firejail/whitelist-var-common.inc Warning: networking feature is disabled in Firejail configuration file Parent pid 2676591, child pid 2676592 Warning: An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set. Post-exec seccomp protector enabled Seccomp list in: !chroot, check list: @default-keep, prelist: unknown, Child process initialized in 73.01 ms ```
gitea-mirror 2026-05-05 09:05:29 -06:00
gitea-mirror commented 2026-05-05 09:05:32 -06:00
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@rusty-snake commented on GitHub (Dec 19, 2020):

I can not reproduce this.

<!-- gh-comment-id:748470090 --> @rusty-snake commented on GitHub (Dec 19, 2020): I can not reproduce this.
gitea-mirror commented 2026-05-05 09:05:33 -06:00
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@EauBureau commented on GitHub (Dec 19, 2020):

Here's jounralctl -f for the following if they're of any use

$ firejail firefox -p

Dec 18 16:08:33 computer audit[154053]: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0
Dec 18 16:08:33 computer kernel: audit: type=1326 audit(1608404913.711:70): auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0

$ firejail firefox

Dec 18 16:09:08 comptuer systemd[1]: Starting Clean php session files...
Dec 18 16:09:08 computer systemd[1]: phpsessionclean.service: Succeeded.
Dec 18 16:09:08 computer systemd[1]: Finished Clean php session files.


$ firefox -p

[nothing logged while the profile selector window appears and this while the actual Firefox window appears]

Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Successfully made thread 155586 of process 155368 owned by '1000' RT at priority 10.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users.
Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users.
Dec 18 16:10:47 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users.
Dec 18 16:10:47 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users.
<!-- gh-comment-id:748514045 --> @EauBureau commented on GitHub (Dec 19, 2020): Here's `jounralctl -f` for the following if they're of any use ``` $ firejail firefox -p Dec 18 16:08:33 computer audit[154053]: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0 Dec 18 16:08:33 computer kernel: audit: type=1326 audit(1608404913.711:70): auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0 ``` ``` $ firejail firefox Dec 18 16:09:08 comptuer systemd[1]: Starting Clean php session files... Dec 18 16:09:08 computer systemd[1]: phpsessionclean.service: Succeeded. Dec 18 16:09:08 computer systemd[1]: Finished Clean php session files. ``` ``` $ firefox -p [nothing logged while the profile selector window appears and this while the actual Firefox window appears] Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 2 threads of 2 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Successfully made thread 155586 of process 155368 owned by '1000' RT at priority 10. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users. Dec 18 16:10:46 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users. Dec 18 16:10:47 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users. Dec 18 16:10:47 computer rtkit-daemon[1288]: Supervising 3 threads of 3 processes of 1 users. ```
gitea-mirror commented 2026-05-05 09:05:35 -06:00
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@rusty-snake commented on GitHub (Dec 19, 2020):

SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0

Maybe firejail '--seccomp=!chroot,!kcmp' firefox -p works.

<!-- gh-comment-id:748533642 --> @rusty-snake commented on GitHub (Dec 19, 2020): > SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=154053 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7fa0cba3a89d code=0x0 Maybe `firejail '--seccomp=!chroot,!kcmp' firefox -p` works.
gitea-mirror commented 2026-05-05 09:05:35 -06:00
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@EauBureau commented on GitHub (Dec 21, 2020):

Maybe firejail '--seccomp=!chroot,!kcmp' firefox -p works.

Unfortunately it doesn't.

$ firejail '--seccomp=!chroot,!kcmp' firefox -p
Reading profile /etc/firejail/firefox.profile
Reading profile /etc/firejail/whitelist-usr-share-common.inc
Reading profile /etc/firejail/firefox-common.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-programs.inc
Reading profile /etc/firejail/whitelist-common.inc
Reading profile /etc/firejail/whitelist-var-common.inc
Warning: networking feature is disabled in Firejail configuration file
Parent pid 313848, child pid 313849
Warning: An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set.
Post-exec seccomp protector enabled
Seccomp list in: !chroot, check list: @default-keep, prelist: unknown,
Child process initialized in 99.36 ms


$ journalctl -f

Dec 20 13:41:12 computer audit[313856]: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=313856 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7f6e2a34889d code=0x0
Dec 20 13:41:12 computer kernel: audit: type=1326 audit(1608562273.052:73): auid=1000 uid=1000 gid=1000 ses=3 pid=313856 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7f6e2a34889d code=0x0
<!-- gh-comment-id:749016089 --> @EauBureau commented on GitHub (Dec 21, 2020): > Maybe `firejail '--seccomp=!chroot,!kcmp' firefox -p` works. Unfortunately it doesn't. ``` $ firejail '--seccomp=!chroot,!kcmp' firefox -p Reading profile /etc/firejail/firefox.profile Reading profile /etc/firejail/whitelist-usr-share-common.inc Reading profile /etc/firejail/firefox-common.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-programs.inc Reading profile /etc/firejail/whitelist-common.inc Reading profile /etc/firejail/whitelist-var-common.inc Warning: networking feature is disabled in Firejail configuration file Parent pid 313848, child pid 313849 Warning: An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set. Post-exec seccomp protector enabled Seccomp list in: !chroot, check list: @default-keep, prelist: unknown, Child process initialized in 99.36 ms ``` ``` $ journalctl -f Dec 20 13:41:12 computer audit[313856]: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 pid=313856 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7f6e2a34889d code=0x0 Dec 20 13:41:12 computer kernel: audit: type=1326 audit(1608562273.052:73): auid=1000 uid=1000 gid=1000 ses=3 pid=313856 comm="GLXVsyncThread" exe="/usr/lib/firefox/firefox" sig=31 arch=c000003e syscall=312 compat=0 ip=0x7f6e2a34889d code=0x0 ```
gitea-mirror commented 2026-05-05 09:05:35 -06:00
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@rusty-snake commented on GitHub (Dec 21, 2020):

Gotcha! The seccomp in the profile overrides the seccomp on the command line. See "Seccomp list in: !chroot, check list: @default-keep, prelist: unknown,". firejail '--seccomp=!chroot,!kcmp' '--ignore=seccomp' firefox -p.

<!-- gh-comment-id:749180889 --> @rusty-snake commented on GitHub (Dec 21, 2020): Gotcha! The `seccomp` in the profile overrides the `seccomp` on the command line. See "Seccomp list in: !chroot, check list: @default-keep, prelist: unknown,". `firejail '--seccomp=!chroot,!kcmp' '--ignore=seccomp' firefox -p`.
gitea-mirror commented 2026-05-05 09:05:36 -06:00
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@EauBureau commented on GitHub (Dec 22, 2020):

Great job. Thank you.

What does this mean: for now I use the new command above, but down the road when a newer version of firejail is released the previous simple firejail firefox -p will work again?

Or is this issue somehow just relevant to my system's setup?

Edit: Does running with the workaround command diminish the security at all?

<!-- gh-comment-id:749756019 --> @EauBureau commented on GitHub (Dec 22, 2020): Great job. Thank you. What does this mean: for now I use the new command above, but down the road when a newer version of firejail is released the previous simple `firejail firefox -p` will work again? Or is this issue somehow just relevant to my system's setup? Edit: Does running with the workaround command diminish the security at all?
gitea-mirror commented 2026-05-05 09:05:36 -06:00
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@rusty-snake commented on GitHub (Dec 22, 2020):

newer version of firejail is released
Or is this issue somehow just relevant to my system's setup?

#3219

for now I use the new command above

You can also add the !kcmp to your firefox.profile/firefox.local, so firejail firefox -p works.

Does running with the workaround command diminish the security at all?

It allows the kcmp syscall.

<!-- gh-comment-id:749761623 --> @rusty-snake commented on GitHub (Dec 22, 2020): > newer version of firejail is released > Or is this issue somehow just relevant to my system's setup? #3219 > for now I use the new command above You can also add the `!kcmp` to your firefox.profile/firefox.local, so `firejail firefox -p` works. > Does running with the workaround command diminish the security at all? It allows the `kcmp` syscall.
gitea-mirror commented 2026-05-05 09:05:37 -06:00
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@EauBureau commented on GitHub (Dec 23, 2020):

You can also add the !kcmp to your firefox.profile/firefox.local, so firejail firefox -p works.

That's perfect, thanks.

Will I close this or do you want to keep it open?

<!-- gh-comment-id:750291484 --> @EauBureau commented on GitHub (Dec 23, 2020): > You can also add the `!kcmp` to your firefox.profile/firefox.local, so `firejail firefox -p` works. That's perfect, thanks. Will I close this or do you want to keep it open?
gitea-mirror commented 2026-05-05 09:05:37 -06:00
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@rusty-snake commented on GitHub (Dec 23, 2020):

Yes, I think we can closes here, there is still #3219 for a general solution on kcmp in mesa+amd.

<!-- gh-comment-id:750379327 --> @rusty-snake commented on GitHub (Dec 23, 2020): Yes, I think we can closes here, there is still #3219 for a general solution on kcmp in mesa+amd.
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Reference: github-starred/firejail#2414
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