ThunderbirdThunderbird Beta
Release Notes

v.26.0b1, released: November 18, 2013

Check out what’s new and known issues for this version of Thunderbird below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.

What’s New

Known Issues

  • Unresolved
    Users on Windows who use the default background update service may see the User Account Control prompt when upgrading Thunderbird (see bug 926975)