Thunderbird 78.0
Earlier this month, Mozilla released a new version of its free — and still excellent — email client: Thunderbird 78.0.

Notable changes in Thunderbird 78.0
Thunderbird 78 is our newest ESR (extended-support release), which comes out yearly and is considered the latest stable release. Right now you can download the newest version from our website, and existing users will be automatically updated in the near future. Thunderbird version 78.0 is only offered as direct download from thunderbird.net and not as an upgrade from Thunderbird version 68 or earlier. A future release will provide updates from earlier versions. Add-on support: As of version 78.0, Thunderbird only supports MailExtensions. Your favorite add-ons may not have been updated for compatibility. Same here (Thunderbird 78.0): Message preview pane doesn't display message headers or contents; New tab doesn't display message headers or contents; New window does display message headers or contents; I disabled every plugin but a provider for google calendar. Thunderbird version 78.1.0 is only offered as direct download from thunderbird.net and not as an upgrade from Thunderbird version 68 or earlier. A future release will provide updates from earlier versions. Automatic updates are available for users already running version 78.0 or higher. It looks like ever since the 78.0 beta 4 upgrade, I CANNOT receive email from my email provider AT&T-Yahoo. I've tried many different configuration changes and nothing has provided a solution. For some reason Thunderbird cannot send the correct password to the servers, to sendreceive email messages.
A total of fourteen security vulnerabilities are addressed in Thunderbird 78.0. That means it’s a good idea to install the new version as soon as possible; email clients are a popular attack vector for malware.
- The compose window has been reworked subtly, to improve usability.
- The recipient address fields (To, Cc, and Bcc) have been changed so that addresses are parsed into ‘pills’, and take less space.
- The account setup screens have been changed to make them easier to understand.
- The mail folder icons have been updated and can now be assigned custom colours.
- On Windows, Thunderbird can now be minimized to the tray (aka the notification area) at the end of the task bar.
- There’s now a global search box on the main window’s title bar. The display of global search results has been improved.

The release notes and What’s New page for Thunderbird 78.0 describe all the changes in the new version.
Getting Thunderbird 78.0
The new version is not yet available through the built-in updater, but it can be freely downloaded and installed from its main download page. If you’re already using Thunderbird and want to upgrade to 78.0, you can install it from the main download page and it will update your current version, leaving all your settings intact.
Mozilla released Thunderbird 78.0.1 a few days after 78.0. The new version addresses a few problems introduced by 78.0. That’s the version you’ll get if you go to the main Thunderbird download page.
Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use. Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.
Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.
What's new in Thunderbird 78.0.1:
Thunderbird 78.0.1 Problems
- OpenPGP: Key revocation, extending key expiration, and secret key backup
Fixes:
Thunderbird 78.0a1
- Drag & Drop multiple attachments to macOS Finder created duplicate files
- Faceted search date and relevance settings not saved
- FileLink attachments included as a link and file when added from a network drive via drag & drop
- About Thunderbird dialog keyboard shortcuts did not work
- CC'd recipients sometimes displayed collapsed in header pane
- Incremental search in contacts sidebar did not always display local results when an LDAP server was also in use
- Contacts sidebar search results cleared after removing a contact
- OpenPGP: Messages with long Armor Header lines did not display
- OpenPGP: Messages containing non-UTF-8 text were not supported
- Various UI and theming fixes
- Chat: Participants list did not display operator flags
Download: Thunderbird 78.0.1 for Windows (EN/US) | 64-bit | ~35.0 MB (Open Source)
Download: Thunderbird 78.0.1 for Linux (EN/US) | 55.5 MB
Download: Thunderbird 78.0.1 for Mac OS (EN/US) | 66.2 MB
Download: Thunderbird 78.0.1 in other languages
View: Thunderbird Website | Release Notes | Screenshot
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