Download Mozilla Thunderbird 91.6.1

The Mozilla Foundation has released version 91.6.1 of Thunderbird. Thunderbird is an open source email and newsgroup client with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 91 includes 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:

changes

• Thunderbird generated views of meeting invitations are now expanded by default

Fixes

• Emails were not downloading at startup under some conditions
• Port numbers were not shown in “Confirm Security Exception” dialog for CalDAV connections
• Various security fixes