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Betterbird 140.9.0Recommended

Think open-source email client, and Mozilla’s Thunderbird comes to mind, but despite resuming development after years of neglect, there are still frustrations with the project. Betterbird is one of several forks designed to address these issues, with the added cachet of being run by the man who maintained Thunderbird while it was on life support.

Described as a ‘soft fork’ of Thunderbird, Betterbird chooses to follow the ESR releases for security reasons, so unlike other forks, won’t diverge from Thunderbird over time. Betterbird claims to be ‘Thunderbird on steroids’, promising exclusive new features and bug fixes, as well as bug fixes submitted upstream to benefit Thunderbird at a future date.

Because they’re so closely related, it’s possible to run both side-by-side using the same profile. This allows you to easily compare the two and decide which one is best for your needs. As a result, you can see where Betterbird has focussed its efforts to deliver what it believes to be a better user experience.

Its highlights showcase how the app attempts to address long-standing issues – a major feature (multi-line view like that found in Outlook) has been a feature request in Thunderbird since 2003, for instance.

Elsewhere there’s tweaks like vertical tabs, account colours and the ability to view attachments above emails, as well as more practical benefits like support for complex search terms (including regular expressions).

Linux users gain a system tray icon displaying the number of new messages for the first time, and you can choose a different startup folder too. Crucially, it’s all rounded off by fixes for bugs left untouched by Thunderbird’s development team.

In practice, many of these tweaks are disabled by default, so you’ll spend a little while configuring the look and feel to get a proper appreciation of how Betterbird looks in comparison, but this means you can still give it a road-test even if your prime concern is determining if it’s a more stable alternative to its parent.

Verdict:

Well worth downloading and testing – you can pick and choose what features you like, and hopefully enjoy a more stable email client to boot.

  • Rating:
    Operating Systems:
  • Windows 10, Windows 11, Windows 7 (64 bit), Windows 8License:
  • Open SourceDeveloper:
  • Betterbird

  • Software Cost:
    Free
  • CategoryDate Updated:
  • 23 March 2026Downloads To Date:
  • 1844Languages:
  • Download Size:
  • 55.00 MB

    Specifications

    Requirements

    64-bit operating system

    Changelog

    What’s new in 140.9.0 (see the release notes for an extensive list of changes)?

    NEW – “Open in Folder” button next to link in calendar event/task dialogue if the link points to an associated message
    CHANGED – Messages scheduled for delayed sending (preferences mailnews.sendInBackground and mailnews.sendInBackground.DelayMinutes) will not be sent as scheduled if “edit message as new” is used on them. That avoids sending an old version of the message while a new version is being prepared.
    CHANGED – Localised versions no longer ship the Mozilla English dictionary to allow users to install a different dictionary, like this one
    FIXED – Link associated with Calendar event/task sometimes not displayed – Bug 2021848
    FIXED – Incorrect ENVID for DSN-aware servers when sending from Outbox – Bug 2018473


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