Thunderbird X64

Users on 64-bit Windows who download Firefox can get our 64-bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less. How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.

Lightning カレンダー あなたの人生を整理する ―― それは時間を管理することです! Thunderbird のメールと完全に統合されたカレンダーで、あなたのスケジュールと人生の重要なイベントを整理しましょう。. No official 64-bit for Windows that is as there is combined 32/64 for Mac and 64-bit for Linux. There are no Win64 Releases for Firefox yet even. It looks like Firefox 38.0 may be the earliest for Win64 Release even though there is a automated Win64 build of 37.0b2 at moment. Mozilla Thunderbird is a fully featured, secure and very functional email client and RSS feed reader. It lets you handle mail efficiently and with style, and Thunderbird filters away junk mail too.

What’s the difference between 32-bit and 64-bit?

Thunderbird x64 download

Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. Also, with the jump from 32 to 64 bits, a security feature called Address Space Layout Randomization (ASLR) works better to protect you from attackers. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit.

How do you get 64-bit Firefox?

If you’re running 64-bit Windows (here’s how to check), your Firefox may already be 64-bit. Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number:

  • If you see “(32-bit)” and you are running Firefox 56.0 or older, updating to the latest Firefox version should automatically upgrade you to 64-bit.
  • If you see “(32-bit)” and are running Firefox 56.0.1 or newer, then your computer may not meet the minimum memory requirement for 64-bit (3 GB RAM or more). You can still manually install 64-bit Firefox, if you choose.
If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.
517,601 downloadsUpdated: April 22, 2021Ad-supported / MPL

Comprehensive e-mail client that lets you chat with other people and supports extensions, multiple tabs, and security features (e.g. signature, certificate, encryption etc.)

What's new in Thunderbird 78.10.0:

  • Fixes:
  • Usability & theme improvements on Windows
  • Various security fixes:
  • CVE-2021-23994: Out of bound write due to lazy initialization
Thunderbird x64 win 10ThunderbirdRead the full changelog

Sending emails has become a very popular means of communication, no matter if you want to send messages to your friends or your work colleagues.

And while there are numerous solutions that can provide you with ease and use and attractive GUIs, Thunderbird still remains one of the most popular email clients out there.

Open-source, hassle-free email client

When installing Thunderbird for the first time, you can leave it to the app to automatically detect all the appropriate server settings for the email address you enter. Alternatively, you can manually enter the SMTP or IMAP details, then check if the connection is successful.

Once this step is completed, you can access the main window and explore the messages from your Inbox and the other folders you might have created (such as Drafts, Sent, Junk, Trash, Outbox, or custom ones like Archives, Important, and so on).

Supports many email operations

When it comes to reading your email messages, you can either use the preview panel or you can open them in a full-screen window - since Thunderbird supports tabs, you can open multiple messages side by side and explore them at the same time.

All the actions you can perform from the dedicated toolbar or menus can also be found in the right-click menu, so you can easily reply, forward or delete messages, as well as move to a new folder or assign relevant tags.

Easily customizable

Just like Mozilla's other flagship product, Firefox, Thunderbird can be personalized via extensions. You can not only tamper with its appearance by installing themes, but you can also enhance its functionality with dedicated add-ons.

Additionally, you can benefit from the built-in task manager and calendar to organize and track events so you do not miss any deadline.


In a nutshell, Thunderbird remains one of the most popular email clients out there due to its versatility and ease of use, thus making it suitable for novices and experts alike.

Filed under

Download Hubs

Thunderbird is part of these download collections: Email Clients, Open XPI, Open JAR, Anti-phishing Protection

Thunderbird was reviewed by Giorgiana Arghire
  • Pentium 4 or newer processor that supports SSE2
  • 1GB RAM
  • 200 MB hard drive space
  • E-mail account
  • Internet Connection
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Thunderbird 78.10.0 / 89.0 Beta 1 / 90.0a1 Nightly

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Mozilla Thunderbird For Windows 10 64 Bit

15 screenshots:
portable version
A portable version of this application is available: Portable Thunderbird
runs on:
Windows 10 32/64 bit
Windows 8 32/64 bit
Windows 7 32/64 bit
file size:
47.6 MB
Thunderbird Setup 78.10.0.exe
main category:
visit homepage

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