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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 60.7.2 16178 Thursday, June 20, 2019 approved
Mozilla Firefox 60.7.1 4728 Tuesday, June 18, 2019 approved
Mozilla Firefox 60.7.0 18550 Wednesday, May 22, 2019 approved
Mozilla Firefox 60.6.2 14600 Monday, May 6, 2019 approved
Mozilla Firefox 60.6.1 26297 Friday, March 22, 2019 approved
Mozilla Firefox 60.6.0 5777 Tuesday, March 19, 2019 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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