> Using firefox package from https://packages.mozilla.org/apt
Can you give more context about that? The terminal Apt log is saying it
is trying to install the snap. However you mentioned something that
might be a third-party deb (I don't know that as the site is returning
error 404).
** Summary changed:
- package firefox 158.0.1~build1 failed to install/upgrade: new firefox package
preinst maintainer script subprocess failed with exit status 1
+ systemctl command [restart snap-firefox-9113.mount] failed with exit status 1:
** Summary changed:
- systemctl command [restart snap-firefox-9113.mount] failed with exit status 1:
+ firefox installation failed: systemctl command [restart
snap-firefox-9113.mount] failed with exit status 1
** Also affects: snapd (Ubuntu)
Importance: Undecided
Status: New
** Changed in: snapd (Ubuntu)
Status: New => Incomplete
** Changed in: firefox (Ubuntu)
Status: New => Incomplete
** Description changed:
Using firefox package from https://packages.mozilla.org/apt
+
+ Apt installation log tail:
+
+ [7mDownload snap "firefox" (9113) from channel "stable" 99%
19.8MB/s 153m[0ms
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.8MB/s 62m[0ms
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.7MB/s 0.0ns[0m
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.4MB/s 0.0ns[0m
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.2MB/s 0.0ns[0m
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.1MB/s 0.0ns[0m
+ [7mDownload snap "firefox" (9113) from channel "stable" 100%
19.0MB/s 0.0ns[0m
+ Fetch and check assertions for snap "firefox" (9113)
\
+ Fetch and check assertions for snap "firefox" (9113)
|
+ Fetch and check assertions for snap "firefox" (9113)
/
+ Fetch and check assertions for snap "firefox" (9113)
-
+ Fetch and check assertions for snap "firefox" (9113)
\
+ Fetch and check assertions for snap "firefox" (9113)
|
+ Process delayed security backend side effects for affected snaps
/
+ Mount snap "firefox" (9113)
-
+ Mount snap "firefox" (9113)
\
+ Mount snap "firefox" (9113)
|
+ Mount snap "firefox" (9113)
/
+ Mount snap "firefox" (9113)
-
+ Mount snap "firefox" (9113)
\
+ Mount snap "firefox" (9113)
|
+ Mount snap "firefox" (9113)
/
+ Mount snap "firefox" (9113)
-
+ Mount snap "firefox" (9113)
\
+ [0m[?25h[Kerror: cannot perform the following tasks:
+ - Mount snap "firefox" (9113) (systemctl command [restart
snap-firefox-9113.mount] failed with exit status 1: stderr:
+ Warning: The unit file, source configuration file or drop-ins of
snap-firefox-9113.mount changed on disk. Run 'systemctl daemon-reload' to
reload units.
ProblemType: Package
DistroRelease: Ubuntu 26.10
Package: firefox 158.0.1~build1
ProcVersionSignature: Ubuntu 7.0.0-39.39-generic 7.0.14
Uname: Linux 7.0.0-39-generic x86_64
NonfreeKernelModules: socwatch2_16 vtsspp sep5 pax
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
Date: Mon Oct 26 09:58:42 2026
ErrorMessage: new firefox package preinst maintainer script subprocess failed
with exit status 1
InstallationDate: Installed on 2026-03-04 (236 days ago)
InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
Python3Details: /usr/bin/python3.14, Python 3.14.8, python3-minimal, 3.14.7-3
PythonDetails: N/A
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
- dpkg 1.23.7ubuntu2
- apt 3.3.3
+ dpkg 1.23.7ubuntu2
+ apt 3.3.3
SourcePackage: firefox
Title: package firefox 158.0.1~build1 failed to install/upgrade: new firefox
package preinst maintainer script subprocess failed with exit status 1
UpgradeStatus: Upgraded to stonking on 2026-10-26 (0 days ago)
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https://bugs.launchpad.net/bugs/2172211
Title:
firefox installation failed: systemctl command [restart snap-
firefox-9113.mount] failed with exit status 1
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