Thunderbird Desktop
Version 81.0beta | Released August 26, 2020
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.
These notes apply to Thunderbird version 81 beta 4 released September 16, 2020.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.12 or later
- Linux: GTK+ 3.14 or higher
What’s New
new
PDF.js viewer now included in Thunderbird
What’s Changed
changed
Address book: Synchronization of CardDAV address books now supported
changed
Calendar: Opening an existing event now opens summary dialog
changed
Chat: Image based emoticons replaced with Unicode
changed
Chat: Non-functional Twitter support removed
changed
MailExtensions: messageDisplay APIs extended to support multiple selected messages
What’s Fixed
fixed
Message list not in focus at startup
fixed
Email filters reported failure when moving a message to original folder
fixed
Sending messages sometimes failed when recipients were in LDAP address book
fixed
Address book: Creating mailing list from contacts sidebar failed
fixed
Address book: Search box icon duplicated after toolbar customization
fixed
Non-functional help menu items removed
fixed
Calendar: Event reminder details were unreadable
fixed
MailExtensions: browser.folders.delete failed on IMAP folders
fixed
MailExtensions: Content scripts in message composer did not work
Changed and Fixed in Beta 2
What’s Changed
changed
OpenPGP enabled by default
changed
OpenPGP: Disabled the use of MD5/SM2/SM3 algorithms
What’s Fixed
fixed
OpenPGP: Users with sub-identities were unable to encrypt or sign messages when switching identities
fixed
Message filters: Filters shown as enabled in configuration dialog were not always enabled
fixed
OpenPGP message security window did not support dark mode
fixed
Thread summaries were unreadable on macOS using dark mode
fixed
Adding custom headers in the addressing widget (preference mail.compose.other.header) did not work
New, Changed, and Fixed in Beta 3
What’s New
new
Drag and Drop reordering of recipient pills now supported
new
Calendar: Remote calendar auto-detection now supported
What’s Changed
changed
OpenPGP: Some signature states reported as "mismatch" now report "unknown"
changed
Privacy policy now displayed in a tab when updated
changed
Installation of "legacy" MailExtensions now disabled
What’s Fixed
fixed
OpenPGP: Improvements to key importing when failures occur
fixed
OpenPGP: Decryption did not work with certain HTTP proxy configurations
fixed
OpenPGP: "Discover keys online" option did not work when searching for an email address
fixed
OpenPGP: Creating a new key pair did not automatically select it for use
fixed
News reader crashed when downloading new articles. See unresolved issues.
fixed
Button to restore default folder icon color was not keyboard accessible
fixed
Windows 10 high-contrast theme fixes
Changed and Fixed in Beta 4
What’s Changed
changed
Reply-To header moved in compose window; now appears under From header
changed
OpenPGP: Do not show external key UI when disabled by preference
changed
Calendar: Sidebar UI improvements
What’s Fixed
fixed
Dragging & Dropping recipient pills resulted in lost pills when an error was present
fixed
Spellcheck suggestions were difficult to read in dark theme
fixed
Calendar: Multiple password prompts opened
fixed
Linux Distributions: UI was not rendered completely when built without updater
Known Issues
unresolved
New news articles are not downloaded
