Download Mozilla Thunderbird 91.5.0

The Mozilla Foundation has released version 91.5 of Thunderbird. Thunderbird is an open source client for e-mail and newsgroups, with features such as support for various mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 91 has included a warning when an email is sent to a potentially non-existent address, or if there are too many addresses on the public address line. There is also support for CardDAV and there is a native client for a Mac equipped with an Apple Silicon processor. The following changes and improvements have also been made in this release:

Fixes

• RSS keyword labels without a configured color were illegal
• Thunderbird “about:” dialog did not identify third-party repackaged distributions such as Flatpaks
• Various security fixes