Thunderbird 91 Available Now - The Thunderbird Blog
https://blog.thunderbird.net/2021/08/thunderbird-91-available-now/
WEBAugust 12, 2021 Ryan Sipes 28 responses. The newest stable release of Thunderbird, version 91, is available for download on our website now. Existing Thunderbird users will be updated to the newest version in the coming weeks. Thunderbird 91 is our biggest release in years with a ton of new features, bug fixes and polish across the app.
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