Mozilla Thunderbird Extended Support Release
A community-led project that allows organizations to benefit from the speed, flexibility and security of Thunderbird while getting the support they need.
The Thunderbird Extended Support Releases (ESR) are mainstream releases, operating similarly to Mozilla Firefox ESR. They are stable for approximately one year before receiving feature updates.
To get help or ask questions about Thunderbird visit Thunderbird support.
You can find the Thunderbird MSI Installer on the Systems & Languages page. For more information about deploying and configuring Thunderbird in business and enterprise environments, you can also join the Enterprise mailing list.