Thunderbird Desktop
Version 91.4.1 | Released December 17, 2021
Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla.
For more on all the new features in Thunderbird 91, see New in Thunderbird 91.0.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.12 or later
- Linux: GTK+ 3.14 or higher
What’s Fixed
fixed
Attachments that should open in Thunderbird, such as ICS attachments, offered to save the file instead
fixed
Saving attachments from IMAP accounts where usernames contained special characters failed
fixed
Temporary files created for forwarded attachments sometimes had the wrong extension
fixed
S/MIME signatures were shown as invalid by Outlook
fixed
URL input boxes on content tabs erroneously displayed a search glass icon on macOS
fixed
Message bars (such as content blocking) did not use high contrast theme colors
fixed
Some messages with autocrypt headers loaded slowly, causing Thunderbird to hang
fixed
Server hostnames were cut-off in the account manager
fixed
Account Setup did not support non-ASCII characters in passwords
fixed
Account Setup did not always retain set values
fixed
Virtual folders did not retain folder selection when a folder name contained non-ASCII characters
fixed
Messages saved as "html" or "eml" did not include message headers
fixed
"Private web page" field was not included when exporting a contact to a vCard
fixed
Addons were still active after restarting Thunderbird in troubleshooting mode with "disable all addons" checked
fixed
FileLink attachments did not always display the FileLink provider's icon
fixed
FileLink privacy notifications persisted in the compose window after removing all FileLink attachments
fixed
"Loading" icon remained after a FileLink upload failed
fixed
Lengthy event names for multiday events did not wrap
fixed
Various theme and UX improvements
fixed
Various security fixes
