Commands for installing Firefox Developer Edition (lt) without prompts, removing it again and detecting it from deployment tools. A command is shown only when it is certain: from the manifest or the installer technology’s documented default.
Related guide: Silent install switches: MSI, NSIS, Inno Setup · Uninstall a program with the registry or PowerShell
With winget
PowerShell
winget install --id Mozilla.Firefox.DeveloperEdition.lt -e --silent --accept-package-agreements --accept-source-agreementswinget upgrade --id Mozilla.Firefox.DeveloperEdition.lt -e --silentwinget uninstall --id Mozilla.Firefox.DeveloperEdition.lt -e --silentBy installer
64-bit · EXE (NSIS) · All users
Silent install
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=trueCustom folder
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=true /D=C:\Apps\firefox-developer-edition-lt- Uninstall registry key
- HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Firefox Developer Edition
ARM64 · EXE (NSIS) · All users
Silent install
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=trueCustom folder
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=true /D=C:\Apps\firefox-developer-edition-lt- Uninstall registry key
- HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Firefox Developer Edition
32-bit · EXE (NSIS) · All users
Silent install
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=trueCustom folder
"Firefox Setup 151.0b10.exe" /S /PreventRebootRequired=true /D=C:\Apps\firefox-developer-edition-lt- Uninstall registry key
- HKLM\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Firefox Developer Edition
PowerShell: download, verify, install
Downloads the official file, checks its SHA256 and installs it silently.
install-firefox-developer-edition-lt.ps1
$url = 'https://download-installer.cdn.mozilla.net/pub/devedition/releases/151.0b10/win64/lt/Firefox%20Setup%20151.0b10.exe'
$sha256 = '16D0B552541EF19BA0071F33C45AB7DE0A83EC3064FB3C5D8915714F8CFF3368'
$file = Join-Path $env:TEMP 'Firefox Setup 151.0b10.exe'
Invoke-WebRequest -Uri $url -OutFile $file -UseBasicParsing
if ((Get-FileHash $file -Algorithm SHA256).Hash -ne $sha256) { throw 'SHA256 mismatch' }
Start-Process -FilePath $file -ArgumentList '/S /PreventRebootRequired=true' -Wait install-firefox-developer-edition-lt.ps1
$url = 'https://download-installer.cdn.mozilla.net/pub/devedition/releases/151.0b10/win64-aarch64/lt/Firefox%20Setup%20151.0b10.exe'
$sha256 = '7EFB92FB1273DECBB52D9B15ED2C844D761A7FCC96D6989C811A16FC6859942E'
$file = Join-Path $env:TEMP 'Firefox Setup 151.0b10.exe'
Invoke-WebRequest -Uri $url -OutFile $file -UseBasicParsing
if ((Get-FileHash $file -Algorithm SHA256).Hash -ne $sha256) { throw 'SHA256 mismatch' }
Start-Process -FilePath $file -ArgumentList '/S /PreventRebootRequired=true' -Wait install-firefox-developer-edition-lt.ps1
$url = 'https://download-installer.cdn.mozilla.net/pub/devedition/releases/151.0b10/win32/lt/Firefox%20Setup%20151.0b10.exe'
$sha256 = '90953920BA64D4F4F6C61B064FE2C8A21791D9C77344C53492A2AD22050F86EE'
$file = Join-Path $env:TEMP 'Firefox Setup 151.0b10.exe'
Invoke-WebRequest -Uri $url -OutFile $file -UseBasicParsing
if ((Get-FileHash $file -Algorithm SHA256).Hash -ne $sha256) { throw 'SHA256 mismatch' }
Start-Process -FilePath $file -ArgumentList '/S /PreventRebootRequired=true' -Wait 
