Mozilla Thunderbird Nebula 139.0.2
Author:
Mozilla
Date: 06/11/2025 Size: 66-131 MB License: Open Source Requires: 11|10|8|7|Linux|macOS Downloads: 3299 times ![]() Restore Missing Windows Files |
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Mozilla Thunderbird Nebula is an email client prioritizing safety, speed, and user-friendliness. It offers a wide range of built-in features, including a user-friendly message search, customizable views, and support for IMAP/POP and RSS. The latest beta and a portable version are also available.
This Mozilla Thunderbird Nebula release channel features a single dynamic toolbar, presenting frequently used and contextual options based on the tab or Space currently active. Take full control by customizing the toolbar and window layout to fit your workflow perfectly. The GUI has also been completely redesigned, making it even easier to navigate and more appealing to the eye.
Mozilla Thunderbird Nebula remains a reliable and safe option for managing your organization's emails. This email client includes several safety features that will benefit you, such as its junk mail filter. This feature efficiently analyzes all incoming mail and detects any likely to be spam. Additionally, you can manually select any emails that may slip through the filter. Thunderbird also uses high-level security measures, including digital signing, message encryption, S/MIME support, certificate support, and security devices, which enterprises and government agencies commonly use.
Mozilla Thunderbird Nebula offers a wide range of Mozilla Add-Ons that allow users to incorporate almost unlimited additional features. These add-ons are essential for building a personalized email client that caters to your requirements.
The latest ESR version of Thunderbird Nebula can be found here.
Similar:
Mozilla Thunderbird Has Both Junk and Spam Folders
This Mozilla Thunderbird Nebula release channel features a single dynamic toolbar, presenting frequently used and contextual options based on the tab or Space currently active. Take full control by customizing the toolbar and window layout to fit your workflow perfectly. The GUI has also been completely redesigned, making it even easier to navigate and more appealing to the eye.
Mozilla Thunderbird Nebula remains a reliable and safe option for managing your organization's emails. This email client includes several safety features that will benefit you, such as its junk mail filter. This feature efficiently analyzes all incoming mail and detects any likely to be spam. Additionally, you can manually select any emails that may slip through the filter. Thunderbird also uses high-level security measures, including digital signing, message encryption, S/MIME support, certificate support, and security devices, which enterprises and government agencies commonly use.
Mozilla Thunderbird Nebula offers a wide range of Mozilla Add-Ons that allow users to incorporate almost unlimited additional features. These add-ons are essential for building a personalized email client that caters to your requirements.
The latest ESR version of Thunderbird Nebula can be found here.
Similar:
Mozilla Thunderbird Has Both Junk and Spam Folders
Version History for Mozilla Thunderbird Nebula:
https://www.thunderbird.net/en-US/thunderbird/139.0.2/releasenotes/
Editor's Note:
This Thunderbird release includes all the latest features. However, it is important to mention that Mozilla does not recommend this version. Instead, users should consider using Thunderbird's ESR (extended support release). The latest ESR version of Thunderbird Nebula can be found here.
Mozilla Thunderbird Nebula no longer supports Windows 7 or 8.

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