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[GH-ISSUE #6487] Host file managers cannot find files in sandbox /proc with --private #3291

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opened 2026-05-05 09:53:36 -06:00 by gitea-mirror · 3 comments

gitea-mirror commented

2026-05-05 09:53:36 -06:00

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Originally created by @ghost on GitHub (Sep 26, 2024).
Original GitHub issue: https://github.com/netblue30/firejail/issues/6487

While using --private --noprofile parameters, any downloaded files in sandbox are invisible for Host file managers

find /proc|grep filename

can't find the file.

Originally created by @ghost on GitHub (Sep 26, 2024). Original GitHub issue: https://github.com/netblue30/firejail/issues/6487 While using --private --noprofile parameters, any downloaded files in sandbox are invisible for Host file managers ~~~ find /proc|grep filename ~~~ can't find the file.

gitea-mirror added the

needinfo

file-transfer

labels 2026-05-05 09:53:36 -06:00

gitea-mirror commented

2026-05-05 09:53:37 -06:00

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@rusty-snake commented on GitHub (Sep 26, 2024):

Your post lists a few facts, but no question or request. So what do you want?

While using --private --noprofile parameters, any downloaded files in sandbox are invisible for Host file managers

Expected.

can't find the file.

procfs and magic symlinks are a crazy, confusing thing. If you think find / grep has a bug, report it to them.

Also where do you expect the file to be found in proc? In /proc/<pid>/fd? In /proc/<pid>/fdinfo?

@rusty-snake commented on GitHub (Sep 26, 2024): Your post lists a few facts, but no question or request. So what do you want? > While using --private --noprofile parameters, any downloaded files in sandbox are invisible for Host file managers Expected. > can't find the file. procfs and magic symlinks are a crazy, confusing thing. If you think find / grep has a bug, report it to them. Also where do you expect the file to be found in proc? In `/proc/<pid>/fd`? In `/proc/<pid>/fdinfo`?

gitea-mirror commented

2026-05-05 09:53:38 -06:00

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@kmk3 commented on GitHub (Sep 26, 2024):

Basic debugging information is missing; please follow the bug report template:

https://github.com/netblue30/firejail/issues/new?template=bug_report.md

@kmk3 commented on GitHub (Sep 26, 2024): Basic debugging information is missing; please follow the bug report template: * <https://github.com/netblue30/firejail/issues/new?template=bug_report.md>

gitea-mirror commented

2026-05-05 09:53:39 -06:00

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@kmk3 commented on GitHub (Sep 26, 2024):

While using --private --noprofile parameters, any downloaded files in sandbox
are invisible for Host file managers

This is the expected behavior of --private.

To transfer files from the sandbox, see --get= and FILE TRANSFER in man firejail.

Alternatively, use --private=foo or whitelist the paths that you need instead
of using --private.

See also:

#4746

@kmk3 commented on GitHub (Sep 26, 2024): > While using --private --noprofile parameters, any downloaded files in sandbox > are invisible for Host file managers This is the expected behavior of `--private`. To transfer files from the sandbox, see `--get=` and `FILE TRANSFER` in `man firejail`. Alternatively, use `--private=foo` or whitelist the paths that you need instead of using `--private`. See also: * #4746

gitea-mirror referenced this issue

2026-05-05 10:25:10 -06:00

[PR #3294] [MERGED] profiles: thunderbird: harden and enable opening links in Firefox #4711

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Reference: github-starred/firejail#3291

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