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Publisher’s description
What is Mozilla Firefox ESR?
Mozilla Firefox ESR is an open-source web browser program for Windows from Mozilla.
Installation and requirements
Official installers exist for 64-bit, ARM64 and 32-bit as EXE (NSIS). Installation asks for administrator rights. The installer supports unattended (silent) installation.
Updates and version history
The current version is 153.7.0, released on November 10, 2026. 101 versions are listed since October 31, 2021, each with links to its own installer files. That is about 20 releases a year. The last update is less than a month old.
Popularity and file types
On Windows it registers 9 file types, including .pdf, .html, .xhtml, .webp and .htm. Similar programs include Brave, Waterfox and LibreWolf.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Frequent updates (about 20 a year)
Cons
- Installation needs administrator rights
In short: Mozilla Firefox ESR is an open-source web browser tool for 64-bit, ARM64 and 32-bit PCs. It is actively maintained. Administrators can deploy it unattended.
Is Mozilla Firefox ESR safe to download?
- The file is served by download-installer.cdn.mozilla.net; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
3D6FABD249AA1338C0667991FB73891FCE941D7DC35BA278DA24074874C67508· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 101 versions ›101 versions over 5 years · about 20 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 153.7.0Latest | November 10, 2026 | — | 32-bit EXE (NSIS)ARM64 EXE (NSIS)64-bit EXE (NSIS) |
| 153.6.0 | October 27, 2026 | — | 64-bit EXE (NSIS)32-bit EXE (NSIS)ARM64 EXE (NSIS) |
| 153.5.1 | October 20, 2026 | — | 32-bit EXE (NSIS)64-bit EXE (NSIS)ARM64 EXE (NSIS) |
| 153.5.0 | October 13, 2026 | — | ARM64 EXE (NSIS)32-bit EXE (NSIS)64-bit EXE (NSIS) |
| 153.4.0 | September 29, 2026 | — | 32-bit EXE (NSIS)64-bit EXE (NSIS)ARM64 EXE (NSIS) |
| 153.3.0 | September 15, 2026 | — | 32-bit EXE (NSIS)64-bit EXE (NSIS)ARM64 EXE (NSIS) |
| 153.2.0 | September 1, 2026 | — | 32-bit EXE (NSIS)ARM64 EXE (NSIS)64-bit EXE (NSIS) |
| 153.1.0 | August 18, 2026 | — | 32-bit EXE (NSIS)64-bit EXE (NSIS)ARM64 EXE (NSIS) |
Release cycle and support
Version 153.7.0 belongs to the 153 (ESR) release line (long-term support), still supported, with no end date announced.
| Release line | Released | Support ends | Latest version | Status |
|---|---|---|---|---|
| 159 | October 27, 2026 | November 10, 2026 | 159.0.1 | Supported |
| 158 | October 13, 2026 | October 27, 2026 | 158.0.1 | End of life |
| 157 | September 29, 2026 | October 13, 2026 | 157.0.1 | End of life |
| 156 | September 15, 2026 | September 29, 2026 | 156.0.1 | End of life |
| 155 | September 1, 2026 | September 15, 2026 | 155.0.1 | End of life |
| 154 | August 18, 2026 | September 1, 2026 | 154.0.1 | End of life |
| 153 (ESR)LTS | July 21, 2026 | not announced | 153.6.0 | Supported |
| 152 | June 16, 2026 | July 21, 2026 | 152.0.6 | End of life |
Install from the command line
Silent install ›winget install --id Mozilla.Firefox.ESR -e"Firefox Setup 153.7.0esr.exe" /S /PreventRebootRequired=trueRelated guide: How to use winget: install and update apps
Also for other systems
brew install --cask firefox@esrInformation
- Publisher
- Mozilla
- Category
- Web browsers
- Licence
- MPL-2.0
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- EXE (NSIS)
- Version
- 153.7.0
- Released
- November 10, 2026
- Added to the catalogue
- October 31, 2021
- Versions listed
- 101
- Updates / year
- 20.1
- Downloads on ExeAtlas
- 20
- Website
- mozilla.org
- winget ID
- Mozilla.Firefox.ESR
File types it opens (9)
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Mozilla Firefox ESR
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Frequently asked questions
Is Mozilla Firefox ESR free?
Yes. Mozilla Firefox ESR is open-source software under the MPL-2.0 licence.
Is Mozilla Firefox ESR safe to download?
The download comes from download-installer.cdn.mozilla.net; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Mozilla Firefox ESR with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Mozilla Firefox ESR be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Mozilla Firefox ESR run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Mozilla Firefox ESR?
The versions page lists all 101 versions with links to their official installer files, back to October 31, 2021.
What are alternatives to Mozilla Firefox ESR?
Brave, Waterfox, LibreWolf, Ablaze Floorp and qutebrowser. The alternatives page compares them.
