[Package Issue]: Mozilla.Firefox.es-ES

[NewPublicUser]

Please confirm these before moving forward

• I have searched for my issue and not found a work-in-progress/duplicate/resolved issue.
• I have not been informed if the issue is resolved in a preview version of the winget client.

Category of the issue

Installation issue.

Brief description of your issue

Issue with winget package identification

Running:

winget list --source winget

returns:

Mozilla Firefox (x64 es-ES) ARP\Machine\X64\Mozilla Firefox 146.0.1

This result is incorrect, because the package is reported with an ARP identifier instead of a valid winget package ID.

Running:

Import-Module Microsoft.WinGet.Client
Get-WinGetPackage | Where-Object { $_.Source -eq 'winget' }

returns:

Mozilla Firefox (en-US) Mozilla.Firefox 146.0.1

This result is also incorrect:

Microsoft.WinGet.Client always reports the wrong package name

The package language does not match the installed Spanish (es-ES) version

The returned ID does not correspond to the actual installed variant

Summary

winget list does not return the correct winget ID for Firefox

Microsoft.WinGet.Client returns a different, incorrect package name and locale

Neither output can be reliably used for package management or automation

In short, winget’s package detection and normalization are fundamentally broken in this case.

Steps to reproduce

Install Mozilla Firefox (x64 es-ES)

Run;
Winget list --sorce "winget"
Import-Module Microsoft.WinGet.Client; Get-WinGetPackage | Where-Object { $_.Source -eq 'winget' }

Actual behavior

Winget list --sorce "winget" ---> returs;

Mozilla Firefox (x64 es-ES) ARP\Machine\X64\Mozilla Firefox 146.0.1

Import-Module Microsoft.WinGet.Client; Get-WinGetPackage | Where-Object { $_.Source -eq 'winget' } --> returns;

Mozilla Firefox (en-US) Mozilla.Firefox 146.0.1

Expected behavior

Winget list --sorce "winget" ---> returs;

Mozilla Firefox (x64 es-ES) Mozilla.Firefox.es-ES 146.0.1

Import-Module Microsoft.WinGet.Client; Get-WinGetPackage | Where-Object { $_.Source -eq 'winget' } --> returns;

Mozilla Firefox (x64 es-ES) Mozilla.Firefox**.es-ES** 146.0.1

Environment

Windows: Windows.Desktop v10.0.26200.7462
Arquitectura del sistema: X64
Paquete: Microsoft.DesktopAppInstaller v1.27.350.0

Screenshots and Logs

No response

[NewPublicUser]

LOL — problem found (this system works terribly).

The Mozilla Firefox uninstall key is located at:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox

However, Winget.Client does not detect the correct package name and ID, and winget list also fails to detect the correct ID.

Both tools instead rely on the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox 146.0.1 (x64 es-ES)

### This is absurd.

Inside the registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox

the DisplayName value already contains:

Mozilla Firefox (x64 es-ES)

Yet neither winget list nor Winget.Client uses this information correctly.