A free email application from Mozilla that's easy to set up and customize

Thunderbird for Mac

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Thunderbird 78.4.0

  -  66.3 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Thunderbird 78.4.0.


For those interested in downloading the most recent release of Thunderbird for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download Thunderbird 78.4.0

  • Thunderbird 78.4.0 Screenshots

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    Thunderbird 78.4.0 Screenshot 1
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  • Thunderbird 78.4.0 Screenshot 5

What's new in this version:

New:
- MailExtensions: browser.tabs.sendMessage API added
- MailExtensions: messageDisplayScripts API added

Changes:
- Yahoo and AOL mail users using password authentication will be migrated to OAuth2
- MailExtensions: messageDisplay APIs extended to support multiple selected messages
- MailExtensions: compose.begin functions now support creating a message with attachments

Fixes:
- Thunderbird could freeze when updating global search index
- Multiple issues with handling of self-signed SSL certificates addressed
- Recipient address fields in compose window could expand to fill all available space
- Inserting emoji characters in message compose window caused unexpected behavior
- Button to restore default folder icon color was not keyboard accessible
- Various keyboard navigation fixes
- Various color-related theme fixes
- MailExtensions: Updating attachments with onBeforeSend.addListener() did not work
- Various security fixes

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