Download Mozilla Thunderbird 31.4.0

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The Mozilla Foundation has released version 31.4.0 of Thunderbird. Mozilla Thunderbird is an open source email and newsgroup client, with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable look and feel. In version 31.4.0 we don’t find any new features, but some bugs and security vulnerabilities have been fixed.

Fixed in version 31.4.0:

  • The previous issues with jp mac builds have now been fixed, and Thunderbird will no longer need to be run in 32-bit mode.
  • Installing extensions within Thunderbird no longer requires download and installing as a file.
  • 2015-04 Cookie injection through Proxy Authenticate responses
  • 2015-03 sendBeacon requests lack an Origin header
  • 2015-01 Miscellaneous memory safety hazards (rv:35.0 / rv:31.4)

The following downloads are available:
Mozilla Thunderbird 31.4.0 for Windows (English)
Mozilla Thunderbird 31.4.0 for Linux (English)
Mozilla Thunderbird 31.4.0 for OS X (English)
Mozilla Thunderbird 31.4.0 for Windows (English)
Mozilla Thunderbird 31.4.0 for Linux (English)
Mozilla Thunderbird 31.4.0 for OS X (English)
Mozilla Thunderbird 31.4.0 for Windows (Frisian)
Mozilla Thunderbird 31.4.0 for Linux (Frisian)
Mozilla Thunderbird 31.4.0 for OS X (Frisian)

Version number 31.4.0
Release status Final
Operating systems Windows 7, Linux, Windows XP, macOS, Windows Vista, Windows 8
Website Mozilla Foundation
Download
File sizes

28.10MB – 58.10MB

License type Freeware
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