Download Mozilla Thunderbird 91.5.1

The Mozilla Foundation has released version 91.5.1 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

• JS LDAP implementation did not support self-signed SSL certificates
• After saving a draft and subsequently sending a FileLink email, the original file was removed from disk
• Chat OTR encryption did not work
• OTR verification bar was not removed after completing verification
• Various theme improvements