SUSE-SU-2025:03447-1: important: Security update for MozillaFirefox

[SLE-UPDATES]

# Security update for MozillaFirefox

Announcement ID: SUSE-SU-2025:03447-1  
Release Date: 2025-10-02T07:14:13Z  
Rating: important  
References:

  * bsc#1250452

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that has one security fix can now be installed.

## Description:

This update for MozillaFirefox fixes the following issues:

Update to Firefox Extended Support Release 140.3.1 ESR (bsc#1250452).

  * Improved reliability when HTTP/3 connections fail: Firefox no longer forces
    HTTP/2 during fallback, allowing the server to choose the protocol and
    preventing stalls on some sites.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2025-3447=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-3447=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * MozillaFirefox-translations-common-140.3.1-112.283.1
    * MozillaFirefox-140.3.1-112.283.1
    * MozillaFirefox-debuginfo-140.3.1-112.283.1
    * MozillaFirefox-debugsource-140.3.1-112.283.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS (noarch)
    * MozillaFirefox-devel-140.3.1-112.283.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * MozillaFirefox-translations-common-140.3.1-112.283.1
    * MozillaFirefox-140.3.1-112.283.1
    * MozillaFirefox-debuginfo-140.3.1-112.283.1
    * MozillaFirefox-debugsource-140.3.1-112.283.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch)
    * MozillaFirefox-devel-140.3.1-112.283.1

## References:

  * https://bugzilla.suse.com/show_bug.cgi?id=1250452

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