Mozilla Thunderbird ESR: A Reliable Email Client

Mozilla Thunderbird ESR is a free and open-source email client designed for Windows users. This program offers a comprehensive suite of features, including email management, newsfeed integration, chat capabilities, and calendaring tools. It emphasizes ease of setup and customization, allowing users to tailor their experience according to personal preferences. The extended support release ensures that users receive new features annually while maintaining monthly stability and security updates.

This version of Thunderbird promotes open standards, enabling seamless communication across various platforms and services. With its focus on user freedom and choice, Thunderbird ESR stands out as a reliable option for individuals seeking a versatile email solution. The program is not only functional but also prioritizes the security and stability necessary for everyday use.

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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 cs 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
b8d77361db9f7abf00acdbe09dd17e16e2612bd90d7d5f401d52f5bd114bbd42
SHA1
6a150429fc61649a0f321626c3755fbef93cf6e1

Softonic security commitment

Mozilla Thunderbird ESR cs 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