Mozilla Thunderbird Beta (MSIX)

by Mozillav148.0.6

Last updated Jun 8, 2026

A free and open source email, newsfeed, chat, and calendaring client that is easy to set up.

Install with winget

$ winget install --id Mozilla.Thunderbird.Beta.MSIX --exact --version 148.0.6

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

Silent install command for Mozilla Thunderbird Beta (MSIX)

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

One-line silent install (x64)

Add-AppxPackage -Path .\Thunderbird%20Setup%20148.0b6.msix

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

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Installers · v148.0.6

Architecture	Type	Scope	Install	Download
x64	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

high8.8Fix in v151.0.0CVE-2026-8975affects before 140.11, 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
high8.8Fix in v151.0.0CVE-2026-8974affects before 140.11, 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
high8.8Fix in v151.0.0CVE-2026-8973affects before 151.0.0May 19, 2026
Memory safety bugs present in 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 and Thunderbird 151.
Vendor advisory
high8.8Fix in v151.0.0CVE-2026-8972affects before 151.0.0May 19, 2026
Privilege escalation in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Vendor advisory
medium6.5Fix in v151.0.0CVE-2026-8971affects before 151.0.0May 19, 2026
Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Vendor advisory
high8.8Fix in v151.0.0CVE-2026-8970affects before 140.11, 151.0.0May 19, 2026
Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Vendor advisory
high8.1Fix in v151.0.0CVE-2026-8969affects before 151.0.0May 19, 2026
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Vendor advisory
high7.5Fix in v151.0.0CVE-2026-8968affects before 140.11, 151.0.0May 19, 2026
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Vendor advisory

Showing 8 of 25. Source: NVD, updated 5h 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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More from Mozilla or browse calendar, elementio, email.

Frequently asked questions

How do I install Mozilla Thunderbird Beta (MSIX) on Windows?

Open Windows Terminal, PowerShell, or Command Prompt and run: winget install --id Mozilla.Thunderbird.Beta.MSIX --exact --version 148.0.6. winget downloads the installer from Mozilla and runs it. Requires Windows 10 (1809+) or Windows 11.

How do I install Mozilla Thunderbird Beta (MSIX) silently for unattended deployment?

Add --silent and accept the agreements upfront: winget install --id Mozilla.Thunderbird.Beta.MSIX --exact 148.0.6 --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 Thunderbird Beta (MSIX)?

Mozilla Thunderbird Beta (MSIX) uses MSIX. MSIX packages install silently by default - no switches are needed (Add-AppxPackage -Path .\Thunderbird%20Setup%20148.0b6.msix).

How do I uninstall Mozilla Thunderbird Beta (MSIX) via winget?

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

Is Mozilla Thunderbird Beta (MSIX) free?

Mozilla Thunderbird Beta (MSIX) is distributed under MPL-2.0. Refer to the publisher (https://support.mozilla.org/kb/thunderbird-beta) for the full license terms - Wingetly itself does not charge for installation.

Does Mozilla Thunderbird 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 Mozilla Thunderbird Beta (MSIX) directly from the publisher.

How do I keep Mozilla Thunderbird Beta (MSIX) up to date?

Run winget upgrade --id Mozilla.Thunderbird.Beta.MSIX --exact, or winget upgrade --all to update everything winget tracks. We index 1 version of Mozilla Thunderbird Beta (MSIX) from microsoft/winget-pkgs.