
Get Involved
Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.
Join UsVersion 78.6.0, first offered to channel users on December 15, 2020
MailExtensions: Added browser.windows.openDefaultBrowser()
Thunderbird now only shows quota exceeded indications on the main window
MailExtensions: menus API enabled in messages being composed
MailExtensions: Honor allowScriptsToClose argument in windows.create API function
MailExtensions: APIs that returned an accountId will reflect the account the message belongs to, not what is stored in message headers
Keyboard shortcut for toggling message "read" status not shown in menus
OpenPGP: After importing a secret key, Key Manager displayed properties of the wrong key
OpenPGP: Inline PGP parsing improvements
OpenPGP: Discovering keys online via Key Manager sometimes failed on Linux
OpenPGP: Encrypted attachment "Decrypt and Open/Save As" did not work
OpenPGP: Importing keys failed on macOS
OpenPGP: Verification of clear signed UTF-8 text failed
Address book: Some columns incorrectly displayed no data
Address book: The address book view did not update after changing the name format in the menu
Calendar: Could not import an ICS file into a CalDAV calendar
Calendar: Two "Home" calendars were visible on a new profile
Calendar: Dark theme was incomplete on Linux
Dark theme did not apply to new mail notification popups
Folder icon, message list, and contact side bar visual improvements
MailExtensions: HTTP refresh in browser content tabs did not work
MailExtensions: messageDisplayScripts failed to run in main window
Various security fixes
Thunderbird performs sluggishly on macOS Big Sur