A discontinued packaged version of the Mozilla platform to enable standalone desktop application developments using XUL.
Publisher’s description
What is XULRunner?
XULRunner is an open-source program for Windows from Mozilla Foundation.
Installation and requirements
Official installers exist for 32-bit as Portable. The main installer is 39.8 MB. It runs without installation (portable).
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
Cons
- No native ARM64 build
- 32-bit only
- No update for more than a year
In short: XULRunner is an open-source Windows tool for 32-bit PCs. Updates have slowed down.
Is XULRunner safe to download?
- The file is served by archive.mozilla.org, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
E7EA4769DEDEEC40EF8C7E18B19F18A55415A1BE630896E146DDD77C7F4B161C· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- 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 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 41.0.2Latest | February 13, 2015 | 39.8 MB | 32-bit ZIP |
Install from the command line
Silent install ›winget install --id Mozilla.XULRunner -eRelated guide: How to use winget: install and update apps
Information
- Publisher
- Mozilla Foundation
- Licence
- MPL
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- Portable
- Version
- 41.0.2
- Released
- February 13, 2015
- Added to the catalogue
- December 29, 2025
- Versions listed
- 1
- Website
- archive.mozilla.org
- winget ID
- Mozilla.XULRunner
Ratings and reviews
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Frequently asked questions
Is XULRunner free?
Yes. XULRunner is open-source software under the MPL licence.
Is XULRunner safe to download?
The download comes from archive.mozilla.org, which belongs to the publisher; 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 XULRunner 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.
Does XULRunner run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
Can I use XULRunner without administrator rights?
Yes, it is portable: unpack and run it.