Comprehensive Overview of Mozilla Thunderbird ESR

Mozilla Thunderbird ESR is a free and open-source email client designed for users seeking an annual release cycle for new features, combined with monthly security and stability updates. This version prioritizes open standards, allowing seamless communication across various platforms and services. Its customization options make it user-friendly, catering to both novice and experienced users alike.

The software supports email, newsfeeds, chat, and calendaring functionalities, providing a comprehensive tool for managing communications. Thunderbird ESR is particularly beneficial for those who prefer a stable environment without frequent changes, ensuring a reliable experience for daily use. Its commitment to user freedom and choice sets it apart in the utilities and tools category.

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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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Is Mozilla Thunderbird ESR pl safe?

100/100

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
Wednesday, January 7, 2026
Scan provider
VirusTotal · Full report

File Integrity

File
140.6.0.exe
SHA256
53db3f226287fa02dda0496108347ccc95fa2a1d5d30fb8be32279a8b90070bb
SHA1
9ece3fbff20206233bc89e403fdc13188c87b4ce

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Mozilla Thunderbird ESR pl 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. For more information, visit our Security and Trust Center