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Firefox Beta (MSIX)

by Mozilla Corporationv159.0.1.0

Last updated

The Firefox release channel below standard and above Developer Edition. Since the MSI and EXE versions of Firefox Beta usually share the same program info as Firefox Standard, this package is the only known way to consistently get Beta.

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Install with winget

$ winget install --id Mozilla.Firefox.Beta.MSIX --exact --version 159.0.1.0

Run in Command Prompt, PowerShell, or Windows Terminal. Prompts for any agreements.

Silent install command for Firefox Beta (MSIX)

Firefox Beta (MSIX) uses MSIX. The silent install switches are (no switches needed).

One-line silent install (x64)
Add-AppxPackage -Path .\Firefox%20Setup%20159.0b1.msix

See the full silent install reference for Firefox Beta (MSIX) →

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Installers · v159.0.1.0

ArchitectureTypeScopeInstallDownload
x86MSIX-Direct
x64MSIX-Direct
arm64MSIX-Direct

Copy a command tailored to that specific architecture, type, and scope - useful when winget would otherwise pick a different default.

Security

25 known CVEs via NVD

  • critical9.8Patched in wingetCVE-2026-106016affects before 157.0.1Oct 6, 2026

    Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.

    Vendor advisory
  • medium4.3Patched in wingetCVE-2026-96869affects before 140.17.0, 153.4.0, 157.0.0Sep 29, 2026

    Information disclosure in the Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

    Vendor advisory
  • high8.8Patched in wingetCVE-2026-100832affects before 115.42.0, 140.17.0, 153.4.0Sep 29, 2026

    Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.

    Vendor advisory
  • high8.8Patched in wingetCVE-2026-100820affects before 140.17.0, 153.4.0, 157.0.0Sep 29, 2026

    Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

    Vendor advisory
  • critical9.6Patched in wingetCVE-2026-100819affects before 115.42.0, 140.17.0, 153.4.0, 157.0.0Sep 29, 2026

    Sandbox escape due to incorrect boundary conditions in the XPCOM component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

    Vendor advisory
  • critical9.6Patched in wingetCVE-2026-100818affects before 140.17.0, 153.4.0, 157.0.0Sep 29, 2026

    Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

    Vendor advisory
  • medium5.4Patched in wingetCVE-2026-100817affects before 157.0.0Sep 29, 2026

    Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

    Vendor advisory
  • high8.1Patched in wingetCVE-2026-100816affects before 153.4.0, 157.0.0Sep 29, 2026

    Site isolation issue in the DOM: Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

    Vendor advisory
Showing 8 of 25. Source: NVD, updated 1h ago. Patch status is best-effort: NVD's fix version is compared against the latest version in winget, but the two version formats don't always align. Confirm with the vendor advisory before treating any specific build as safe.

See a CVE that affects your fleet? Push the patched version to Intune in one click with Pckgr - automated patching is the only way to keep up.

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    The Firefox release channel below Beta and above Nightly. Get the latest features, fast performance, and the development tools you need to build for the open web using Firefox Browser Developer Edition.

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  • Cromiteuazo
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More from Mozilla Corporation or browse 9nzw26frndln, gecko, media-player.

Frequently asked questions

How do I install Firefox Beta (MSIX) on Windows?
Open Windows Terminal, PowerShell, or Command Prompt and run: winget install --id Mozilla.Firefox.Beta.MSIX --exact --version 159.0.1.0. winget downloads the installer from Mozilla Corporation and runs it. Requires Windows 10 (1809+) or Windows 11.
How do I install Firefox Beta (MSIX) silently for unattended deployment?
Add --silent and accept the agreements upfront: winget install --id Mozilla.Firefox.Beta.MSIX --exact 159.0.1.0 --silent --accept-package-agreements --accept-source-agreements. This is the variant Intune, Configuration Manager, and other deployment tools should use.
What are the silent install switches for Firefox Beta (MSIX)?
Firefox Beta (MSIX) uses MSIX. MSIX packages install silently by default - no switches are needed (Add-AppxPackage -Path .\Firefox%20Setup%20159.0b1.msix).
How do I uninstall Firefox Beta (MSIX) via winget?
Run: winget uninstall --id Mozilla.Firefox.Beta.MSIX --exact. Add --silent for unattended uninstalls. winget will use the registered uninstaller from Firefox Beta (MSIX)'s Apps & Features entry.
Is Firefox Beta (MSIX) free?
Firefox Beta (MSIX) is distributed under MPL-2.0. Refer to the publisher (https://www.firefox.com/channel/desktop/) for the full license terms - Wingetly itself does not charge for installation.
Does Firefox Beta (MSIX) work on Windows 10?
Yes, as long as your Windows 10 build supports winget (1809 or newer). winget ships with App Installer on Windows 10/11 and pulls Firefox Beta (MSIX) directly from the publisher.
How do I keep Firefox Beta (MSIX) up to date?
Run winget upgrade --id Mozilla.Firefox.Beta.MSIX --exact, or winget upgrade --all to update everything winget tracks. We index 4 versions of Firefox Beta (MSIX) from microsoft/winget-pkgs.

Recent versions

  • 159.0.1.0latest
  • 158.0.5.0
  • 153.0.11
  • 148.0.15.0