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This is not the latest version of Mozilla Firefox available.

Mozilla Firefox


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This package was approved as a trusted package on 1/26/2016.

Bringing together all kinds of awesomeness to make browsing better for you.

This package installs Firefox in the first language which matches this list:

  1. Install arguments override parameter if present, e.g. choco install Firefox -packageParameters "l=en-GB". To get a list of all available locales have a look at this file:
  2. If Firefox is already installed: the same language as the already installed Firefox.
  3. The Windows system language where the Firefox package gets installed.
  4. If Firefox does not support the system language, it will fall back to “en-US”

Looking for Firefox Developer Edition? Install the firefox-dev package.

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

C:\> choco install firefox --version 44.0

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

C:\> choco upgrade firefox --version 44.0


  • tools\chocolateyInstall.ps1 Show
    # This is the general install script for Mozilla products (Firefox and Thunderbird).
    # This file must be identical for all Choco packages for Mozilla products in this repository.
    $packageName = 'Firefox'
    $fileType = 'exe'
    $version = '44.0'
    $allLocalesListURL = ''
    # ---------------- 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() {
      $availableLocales = (New-Object System.Net.WebClient).DownloadString($allLocalesListURL)
      # --- Get locale from installArgs if specified
      $packageParameters = $env:chocolateyPackageParameters
      $packageParameters = if ($packageParameters -ne $null) { $packageParameters } else { "" }
      $argumentMap = ConvertFrom-StringData $packageParameters
      $localeFromPackageParameters = $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 = $localeFromPackageParameters, $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
      return $false
    function Get-32bitOnlyInstalled {
      $systemIs64bit = Get-ProcessorBits 64
      if (-Not $systemIs64bit) {
        return $false
      $registryPaths = @(
      $installedVersions = Get-ChildItem $registryPaths | Where-Object {
        $_.Name -match 'Mozilla Firefox [\d\.]+ \(x(64|86)'
      if (
        $installedVersions -match 'x86' `
        -and $installedVersions -notmatch 'x64' `
        -and $systemIs64bit
      ) {
        return $true
    # ----------------------------------
    $alreadyInstalled = AlreadyInstalled($version)
    if (Get-32bitOnlyInstalled) {
      Write-Output $(
        'Detected the 32-bit version of Firefox on a 64-bit system. ' +
        'This package will continue to install the 32-bit version of Firefox ' +
        'unless the 32-bit version is uninstalled.'
    if ($alreadyInstalled) {
      Write-Output $(
        "Firefox $version is already installed. " +
        'No need to download an re-install again.'
    } else {
      $locale = GetLocale
      $url = "${version}&os=win&lang=${locale}"
      $url64 = "${version}-SSL&os=win64&lang=${locale}"
      $silentArgs = '-ms'
      if ((Get-32bitOnlyInstalled) -or (Get-ProcessorBits 32)) {
        Install-ChocolateyPackage $packageName $fileType $silentArgs $url
      } else {
        Install-ChocolateyPackage $packageName $fileType $silentArgs $url $url64

Virus Scan Results

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.


This package has no dependencies.

Package Maintainer(s)

Software Author(s)

  • Mozilla


Version History

Version Downloads Last updated Status
Mozilla Firefox 69.0 218386 Tuesday, September 3, 2019 approved
Mozilla Firefox 68.0.2 269074 Wednesday, August 14, 2019 approved
Mozilla Firefox 68.0.1 264621 Thursday, July 18, 2019 approved
Mozilla Firefox 68.0 132941 Tuesday, July 9, 2019 approved
Mozilla Firefox 67.0.4 197405 Thursday, June 20, 2019 approved
Mozilla Firefox 67.0.3 64526 Tuesday, June 18, 2019 approved
Mozilla Firefox 67.0.2 108696 Tuesday, June 11, 2019 approved
Mozilla Firefox 67.0.1 103406 Tuesday, June 4, 2019 approved
Mozilla Firefox 67.0 136069 Wednesday, May 22, 2019 approved
Show More

Discussion for the Mozilla Firefox Package

Ground rules:

  • This discussion is only about Mozilla Firefox and the Mozilla Firefox 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.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or Mozilla Firefox, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
  • If you use a url, the comment will be flagged for moderation until you've been whitelisted. Disqus moderated comments are approved on a weekly schedule if not sooner. It could take between 1-5 days for your comment to show up.

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