Mozilla Firefox (MSIX) Nightly

by Mozillav153.2606.1221.0

Last updated Jun 14, 2026

Firefox browser nightly builds

Install with winget

$ winget install --id Mozilla.Firefox.Nightly.MSIX --exact --version 153.2606.1221.0

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

Silent install command for Mozilla Firefox (MSIX) Nightly

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

One-line silent install (x64)

Add-AppxPackage -Path .\firefox-153.0a1.multi.win64.installer.msix

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

Built by Pckgr

For Intune admins

Stop chasing app updates. Pckgr patches them for you.

Automated application patching for Microsoft Intune. Pckgr keeps a curated library of 1,000+ apps continuously up-to-date in your tenant via Microsoft Graph - no manual repackaging, no chasing vendor sites.

Start free 30-day trial

No credit card required.

About

Firefox is a free and open-source web browser developed by the Mozilla Foundation. Nightly provides the latest development patches and fixes, before they are introduced into other stable versions.

Installers · v153.2606.1221.0

Architecture	Type	Scope	Download
x86	MSIX	-	Direct
x64	MSIX	-	Direct
arm64	MSIX	-	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

medium4.3Patched in wingetCVE-2026-10702affects before 151.0.3Jun 2, 2026
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 151.0.3.
Vendor advisory
high7.5Patched in wingetCVE-2026-10701affects before 151.0.3Jun 2, 2026
Incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 151.0.3.
Vendor advisory
medium5.4Patched in wingetCVE-2026-9309affects before 151.2Jun 1, 2026
Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View behavior and leaked sensitive URL parameters. These parameters could then be used to access internal pages, potentially resulting in a...
Vendor advisory
medium5.4Patched in wingetCVE-2026-9308affects before 151.2Jun 1, 2026
Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vu...
Vendor advisory
medium5.4Patched in wingetCVE-2026-9078affects before 151.1May 25, 2026
Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A crafted RTL hostname could visually reorder portions of the displayed domain, causing attacker-controlled sites to appear as trust...
Vendor advisory
medium6.5Patched in wingetCVE-2026-8706affects before 151.0May 19, 2026
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
Vendor advisory
high8.8Patched in wingetCVE-2026-8975affects before 115.36.0, 140.11.0, 151.0.0May 19, 2026
Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Fir...
Vendor advisory
high8.8Patched in wingetCVE-2026-8974affects before 140.11.0, 151.0.0May 19, 2026
Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ES...
Vendor advisory

Showing 8 of 25. Source: NVD, updated 4h 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.

Related apps

Mozilla Firefox (en-US)Mozilla
Mozilla.Firefoxv151.0.4
Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
I
IceCatMozilla
Icecat.Icecatv115.24.0
The GNU version of the Firefox browser
Mozilla Firefox (pt-PT)Mozilla
Mozilla.Firefox.pt-PTv151.0.4
Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
Mozilla Firefox (zh-TW)Mozilla
Mozilla.Firefox.zh-TWv151.0.4
Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
Mozilla Firefox (te)Mozilla
Mozilla.Firefox.tev151.0.4
Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
Mozilla Firefox (MSIX)Mozilla
Mozilla.Firefox.MSIXv151.0.4
Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.

More from Mozilla or browse browser, gecko, internet.

Frequently asked questions

How do I install Mozilla Firefox (MSIX) Nightly on Windows?

Open Windows Terminal, PowerShell, or Command Prompt and run: winget install --id Mozilla.Firefox.Nightly.MSIX --exact --version 153.2606.1221.0. winget downloads the installer from Mozilla and runs it. Requires Windows 10 (1809+) or Windows 11.

How do I install Mozilla Firefox (MSIX) Nightly silently for unattended deployment?

Add --silent and accept the agreements upfront: winget install --id Mozilla.Firefox.Nightly.MSIX --exact 153.2606.1221.0 --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 Mozilla Firefox (MSIX) Nightly?

Mozilla Firefox (MSIX) Nightly uses MSIX. MSIX packages install silently by default - no switches are needed (Add-AppxPackage -Path .\firefox-153.0a1.multi.win64.installer.msix).

How do I uninstall Mozilla Firefox (MSIX) Nightly via winget?

Run: winget uninstall --id Mozilla.Firefox.Nightly.MSIX --exact. Add --silent for unattended uninstalls. winget will use the registered uninstaller from Mozilla Firefox (MSIX) Nightly's Apps & Features entry.

Is Mozilla Firefox (MSIX) Nightly free?

Mozilla Firefox (MSIX) Nightly is distributed under MPL-2.0. Refer to the publisher (https://www.firefox.com/en-US/channel/desktop/?redirect_source=mozilla-org) for the full license terms - Wingetly itself does not charge for installation.

Does Mozilla Firefox (MSIX) Nightly 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 Mozilla Firefox (MSIX) Nightly directly from the publisher.

How do I keep Mozilla Firefox (MSIX) Nightly up to date?

Run winget upgrade --id Mozilla.Firefox.Nightly.MSIX --exact, or winget upgrade --all to update everything winget tracks. We index 10 versions of Mozilla Firefox (MSIX) Nightly from microsoft/winget-pkgs.

Recent versions

153.2606.1221.0latest
153.2606.1108.0
153.2606.1000.0
153.2606.708.0
153.2606.509.0
153.2606.403.0
153.2606.309.0
153.2606.108.0
153.2605.3009.0
153.2605.2909.0