Mozilla Thunderbird v140.6.0 Extended Support Release - Free Download



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 Home » OlderGeeks.com Freeware Downloads » Email Programs, Utilities and News Readers » Mozilla Thunderbird v140.6.0 Extended Support Release   
File - Download Mozilla Thunderbird v140.6.0 Extended Support Release
Description
A plea...
Deanna and I have been running this site since 2008 and lately we're seeing a big increase in
users (and cost) but a decline in percentage of users who donate. Our ad-free and junkware-free
download site only works if everyone chips in to offset the revenue that ads on other sites bring
in. Please donate at the bottom of the page. Every little bit helps. Thank you so much.
Sincerely,
your Older Geeks: Randy and Deanna



Always scroll to the bottom of the page for the main download link.
We don't believe in fake/misleading download buttons and tricks. The link is always in the same place.


Mozilla Thunderbird v140.6.0 Extended Support Release
This release is intended for users who want all available new features on an annual basis and stability/security fixes on a monthly basis.

Mozilla's fastest, most beautiful email, calendar, and contacts release yet. Designed to maximize your freedoms.

Freedom from Chaos. Waste less time finding browser tabs. Access all your messages, calendars, and contacts in one fast app. Filter and organize the way you like. Manage all accounts separately or in a unified inbox. Thunderbird simply makes your life simpler.




Freedom from Manipulation
Mozilla's agenda isn’t hidden. It’s to make the world better.
Thunderbird is funded by user donations. They don’t collect personal data, sell ads in your inbox, or secretly train AI with your private conversations. Thunderbird is open source. As part of the Mozilla family you can be confident they always put your privacy and security first.

Freedom to Geek Out
Thunderbird is yours.
Thunderbird is clean and elegant by default, but easily customizable to match your workflow and visual preferences. It is loaded with unique and powerful features.

Key Features Include:
• Mail Account Setup Wizard
• One-click Address Book
• Attachment Reminder
• Tabbed Email
• Quick Filter Toolbar
• Search Tools
• Message Archive
• Large Files Management
• Smart Folders
• Add-ons Manager
• Robust Privacy
• Phishing Protection
• Automated Update
• Junk Mail Tools
• Open Source

System Requirements:
Windows
Windows 10 or later

Windows Recommended Hardware
1GHz or faster Intel/AMD compatible processor
1GB RAM / 2GB of RAM for the 64-bit version
500 MB hard drive space
additional hard drive space for mail storage


Mac
macOS 10.15 or later

Mac Recommended Hardware
Mac computer with an Intel x86 or Apple Silicon processor
512 MB RAM
200 MB hard drive space
additional hard drive space for mail storage


GNU/Linux

Linux Software Requirements
Please note that GNU/Linux distributors may provide packages for your distribution which have different requirements.

Thunderbird will not run at all without the following libraries or packages:
glibc 2.17 or higher
GTK+ 3.14 or higher
libglib 2.42 or higher
libstdc++ 4.8.1 or higher
X.Org 1.0 or higher (1.7 or higher is recommended)


For optimal functionality, we recommend the following libraries or packages:
DBus 1.0 or higher
NetworkManager 0.7 or higher
PulseAudio

Changes:
v14.0
New:
Drop-down drawer is now enabled
Fixed:
'Auto-fit messages' display setting did not persist
Edge-to-edge regressed moving/copying message with 3-button navigation
Unified Account was displayed when there was only one account
Swiping message left or right with slight downward motion aborted prematurely
Crash occurred when setting archive folder via swipe after it was set to None
Outlook SMTP failed to authenticate for enterprise or educational accounts
Gmail folder prefixes appeared after refreshing folder list
During account setup, 'Your Name' field was mislabeled as 'Display Name'
Quiet time preferences were ignored
Thunderbird could crash when deleting an account and returning to the message list





This download is for the Windows 10 and higher 64bit version (very bottom of page).
All other download assets are below:

Windows 10 and higher version:
thunderbird32bit-140.6.0esr.tar.xz (32bit)

Windows 7/8/8.1:
Thunderbird Setup 115.18.0.exe
Thunderbird Setup32bit 115.18.0.exe (32bit)

MacOS:
Thunderbird 140.6.0esr.dmg

Linux:
thunderbird-140.6.0esr.tar.xz
thunderbird32bit-140.6.0esr.tar.xz (32bit)



Click here to visit the author's website.
Continue below for the main download link.


Downloads Views Developer Last Update Version Size Type Rank
8,565 23,685 The Mozilla Organization Dec 17, 2025 - 12:32 140.6.0 Extended Support Release 71.17MB EXE 5/5, out of 91 Votes.
File Tags
Thunderbird  Mozilla  Extended  Support  Release  v140.6.0  
      
Ope! Hold on, Speedy.
You gotta read this before you download below:

There are no ads, no fake download buttons and no crapware here.
This website has lived for 18 years solely through donations.
You can download without donating but we use the "Honor System"
here in the Ozarks. If your momma raised you to be honorable,
make your donation to keep things running.
Your momma would be so proud!

Thank you! -Randy & Deanna (The Older Geeks)
Missouri Ozarks, USA

Monthly operating costs = $750
Donations cover operating costs first
then are set aside for future upgrades and/or
handed-over to Deanna for new shoes.


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