Comprehensive Overview of Mozilla Thunderbird ESR

Mozilla Thunderbird ESR is a free, open-source email client designed for Windows, focusing on stability and security. This official annual extended support release offers users new features annually, alongside monthly stability and security updates. Its user-friendly interface allows for easy setup and customization, making it suitable for both casual and professional users.

One of Thunderbird's core principles is promoting open standards, which enhances interoperability among various platforms and services. Users benefit from a robust set of tools for email, newsfeeds, chat, and calendaring, providing a versatile communication solution. Thunderbird ESR empowers users with freedom and choice in their communication methods, ensuring a customizable experience tailored to individual needs.

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Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

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Scan Info

Last scan
Tuesday, September 16, 2025
Scan provider
VirusTotal · Full report

File Integrity

File
140.2.1.exe
SHA256
1fdd1c540ecf7f79190aaa9a1ae66c92cc91d8751194801794519351e47b495b
SHA1
2df28d70984da420046c008008a95f6c14a67f66

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Mozilla Thunderbird ESR cak has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.