Thunderbird Desktop
Version 78.4.0 | Released October 21, 2020
Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.
For more on all of the new features in Thunderbird 78, see New in Thunderbird 78.0.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.9 or later
- Linux: GTK+ 3.14 or higher
What’s New
new
MailExtensions: browser.tabs.sendMessage API added
new
MailExtensions: messageDisplayScripts API added
What’s Changed
changed
Yahoo and AOL mail users using password authentication will be migrated to OAuth2
changed
MailExtensions: messageDisplay APIs extended to support multiple selected messages
changed
MailExtensions: compose.begin functions now support creating a message with attachments
What’s Fixed
fixed
Thunderbird could freeze when updating global search index
fixed
Multiple issues with handling of self-signed SSL certificates addressed
fixed
Recipient address fields in compose window could expand to fill all available space
fixed
Inserting emoji characters in message compose window caused unexpected behavior
fixed
Button to restore default folder icon color was not keyboard accessible
fixed
Various keyboard navigation fixes
fixed
Various color-related theme fixes
fixed
MailExtensions: Updating attachments with onBeforeSend.addListener() did not work
fixed
Various security fixes
Learn What’s Next
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