[GH-ISSUE #3626] Firefox is already running, but is not responding. #2278

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opened 2026-05-05 08:58:11 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 08:58:11 -06:00

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Originally created by @michaepr on GitHub (Sep 8, 2020).
Original GitHub issue: https://github.com/netblue30/firejail/issues/3626

Hello,

I've recently done a full reinstall of my Arch Linux. I'm running Sway on Wayland (no XWayland) and I've installed firejail version 0.9.62.4.

When I run firefox without firejail I can open two windows (belonging to the same instance) by just typing 'firefox' into two separate terminals. When I do the same with firejail, when opening the second window I get the error message: "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile". That sounds to me like a new firefox instance is created even though I just want to add a new window to the existing instance. Everything works fine if I create a firefox-common.local file with "ignore nodbus".

I was wondering if this behaviour is expected and which potential security risks I have by enabling dbus connections. If it's not expected, do you know what could be causing it?

Thanks for your help!
Michael

Originally created by @michaepr on GitHub (Sep 8, 2020). Original GitHub issue: https://github.com/netblue30/firejail/issues/3626 Hello, I've recently done a full reinstall of my Arch Linux. I'm running Sway on Wayland (no XWayland) and I've installed firejail version 0.9.62.4. When I run firefox without firejail I can open two windows (belonging to the same instance) by just typing 'firefox' into two separate terminals. When I do the same with firejail, when opening the second window I get the error message: "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile". That sounds to me like a new firefox instance is created even though I just want to add a new window to the existing instance. Everything works fine if I create a firefox-common.local file with "ignore nodbus". I was wondering if this behaviour is expected and which potential security risks I have by enabling dbus connections. If it's not expected, do you know what could be causing it? Thanks for your help! Michael

gitea-mirror

2026-05-05 08:58:11 -06:00

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gitea-mirror commented

2026-05-05 08:58:14 -06:00

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@rusty-snake commented on GitHub (Sep 9, 2020):

Duplicate of #3290

Firefox uses D-Bus instead of IDK SystemV5-IPC? to talk to running instances if it runs as native Wayland client.

I was wondering if this behaviour is expected

Knowed and fixed in the next release (in a few weeks)

potential security risks I have by enabling dbus connections.

Full escape. Allowing full D-Bus access (not selective as possible with 0.9.64) allows to run any command outside of the sandbox. I suggest you to live with that restriction for now and wait for firejail 0.9.64. As an alternative you can install the firejail-git package from the AUR.

@rusty-snake commented on GitHub (Sep 9, 2020): Duplicate of #3290 Firefox uses D-Bus instead of IDK SystemV5-IPC? to talk to running instances if it runs as native Wayland client. > I was wondering if this behaviour is expected Knowed and fixed in the next release (in a few weeks) > potential security risks I have by enabling dbus connections. Full escape. Allowing full D-Bus access (not selective as possible with 0.9.64) allows to run any command outside of the sandbox. I suggest you to live with that restriction for now and wait for firejail 0.9.64. As an alternative you can install the firejail-git package from the AUR.

gitea-mirror referenced this issue

2026-05-05 10:16:35 -06:00

[PR #2278] [MERGED] Update kdenlive.profile #4251

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Reference: github-starred/firejail#2278

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