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Editors' Review · September 16, 2025

In-Depth Review of Mozilla Thunderbird ESR

Mozilla Thunderbird ESR is an open-source email client designed for users seeking stability and security. This version features an annual release cycle focused on new functionalities while ensuring regular monthly updates for security and performance. With support for multiple email accounts, it seamlessly integrates with various services and platforms, making it a versatile tool for managing communications. Users can customize their experience with numerous add-ons and themes, enhancing usability for both beginners and advanced users.

The client offers comprehensive features such as email management, chat integration, newsfeeds, and calendaring, all within a single application. Thunderbird ESR stands out for its commitment to open standards, ensuring compatibility and user control. Its focused approach on stability means users can rely on it for day-to-day operations without the disruptions of frequent updates, making it a preferred choice for those who value a consistent tool for their communication needs.

Technical

Title
Mozilla Thunderbird ESR pl 140.2.1 for Windows
Requirements
Windows 11
License
Free
Latest update
Author
Mozilla Foundation
SHA-1
8dfac47fcaaa2db7d90bce1fa3bb0d96a84bd7eb
Filename
140.2.1.exe

Program available in other languages



Changelog

We don’t have any change log information yet for version 140.2.1 of Mozilla Thunderbird ESR pl. Sometimes publishers take a little while to make this information available, so please check back in a few days to see if it has been updated.

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