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This is not the latest version of Mozilla Firefox ESR available.

Mozilla Firefox ESR


Package test results are passing.

This package was approved by moderator gep13 on 1/7/2016.

This package installs Firefox ESR

To install Mozilla Firefox ESR, run the following command from the command line or from PowerShell:

C:\> choco install firefoxesr --version 38.1.1

To upgrade Mozilla Firefox ESR, run the following command from the command line or from PowerShell:

C:\> choco upgrade firefoxesr --version 38.1.1


  • tools\chocolateyInstall.ps1 Show
    # ---------------- Function definitions ------------------
    function GetUninstallPath () {
        $regUninstallDir = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\'
        $regUninstallDirWow64 = 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\'
        $uninstallPaths = $(Get-ChildItem $regUninstallDir).Name
        if (Test-Path $regUninstallDirWow64) {
            $uninstallPaths += $(Get-ChildItem $regUninstallDirWow64).Name
        $uninstallPath = $uninstallPaths -match "Mozilla Firefox [\d\.]+ \([^\s]+ [a-zA-Z\-]+\)" | Select -First 1
        return $uninstallPath
    function GetLocale($installArguments) {
        $availableLocales = Get-Content "$env:TEMP\chocolatey\Firefox\availableLocales.html"
        # --- Get locale from installArgs if specified
        $argumentMap = ConvertFrom-StringData $installArguments
        $localeFromInstallArgs = $argumentMap.Item('l')
        # ---
        # --- Get already installed locale if available
        $uninstallPath = GetUninstallPath($null)
        $alreadyInstalledLocale = $uninstallPath -replace ".+\s([a-zA-Z\-]+)\)", '$1'
        # ---
        # --- Other locales
        $systemLocaleAndCountry = (Get-Culture).Name
        $systemLocaleTwoLetter = (Get-Culture).TwoLetterISOLanguageName
        $fallbackLocale = 'en-US'
        # ---
        $locales = $localeFromInstallArgs, $alreadyInstalledLocale, $systemLocaleAndCountry, $systemLocaleTwoLetter, $fallbackLocale
        foreach ($locale in $locales) {
            $localeMatch = $availableLocales -match "os=win&lang=$locale`"" | Select -First 1
            if ($localeMatch -and $locale -ne $null) {
        return $locale
    function AlreadyInstalled($version) {
        $uninstallEntry = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox ${version}*"
        $uninstallEntryWow64 = "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox ${version}*"
        if ((Test-Path $uninstallEntry) -or (Test-Path $uninstallEntryWow64)) {
            return $true
        } else {
            return $false
    # ----------------------------------
    $packageName = 'Firefox'
    $fileType = 'exe'
    $version = '38.1.1'
    $urlFile = ''
    $filePath = "$env:TEMP\chocolatey\$packageName"
    $alreadyInstalled = AlreadyInstalled($version)
    if ($alreadyInstalled) {
        Write-Host "Firefox $version is already installed."
    } else {
    if (-not (Test-Path $filePath)) {
            New-Item -ItemType directory -Path $filePath
        Get-ChocolateyWebFile 'locales list for Firefox' "$env:TEMP\chocolatey\$packageName\availableLocales.html" $urlFile
        $locale = GetLocale($installArguments)
        $url = "${version}esr&os=win&lang=${locale}"
        Install-ChocolateyPackage $packageName $fileType '-ms' $url

Virus Scan Results

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This package has no dependencies.

Package Maintainer(s)

Software Author(s)

  • Mozilla


Version History

Version Downloads Last updated Status
Mozilla Firefox 60.2.2 21917 Wednesday, October 3, 2018 approved
Mozilla Firefox 60.2.1 24219 Saturday, September 22, 2018 approved
Mozilla Firefox 60.2.0 38811 Thursday, September 6, 2018 approved
Mozilla Firefox ESR 60.0 38820 Wednesday, May 9, 2018 approved
Mozilla Firefox 52.9.0 440 Tuesday, June 26, 2018 approved
Mozilla Firefox 52.8.1 111 Thursday, June 7, 2018 approved
Mozilla Firefox 52.8.0 1459 Saturday, May 12, 2018 approved
Mozilla Firefox ESR 52.7.4 2711 Monday, May 7, 2018 approved
Mozilla Firefox ESR 52.7.3 23227 Tuesday, March 27, 2018 approved
Show More

Discussion for the Mozilla Firefox ESR Package

Ground rules:

  • This discussion is only about Mozilla Firefox ESR and the Mozilla Firefox ESR package. If you have feedback for Chocolatey, please contact the google group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
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  • Tell us what you love about the package or Mozilla Firefox ESR, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
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