Mozilla Thunderbird, Portable Edition 78.1.0 Test 1 (email client) Released

John T. Haller's picture
Submitted by John T. Haller on July 31, 2020 - 1:48pm

Mozilla Thunderbird®, Portable Edition 78.1.0 Test 1 has been released. It's the popular Mozilla Thunderbird email client bundled with a launcher as a portable app. This package allows you to test the upcoming version without impacting your standard portable or local install of Thunderbird. It's packaged in Format so it can easily integrate with the Platform. And it's open source and completely free.

Mozilla®, Thunderbird® and the Thunderbird logo are registered trademarks of the Mozilla Foundation and are used under license.

Update automatically or install from the portable app store (advanced apps enabled) in the Platform.


Mozilla Thunderbird is the safe, fast email client that's easy to use. It has lots of great features including quick message search, customizable views, support for IMAP/POP, RSS support and more. Plus, the portable version leaves no personal information behind on the machine you run it on, so you can take your email and adress book with you wherever you go. Learn more about Mozilla Thunderbird... Installer / Format

Mozilla Thunderbird, Portable Edition is packaged in a Installer so it will automatically detect an existing installation when your drive is plugged in. It supports upgrades by installing right over an existing copy, preserving all your email and settings. And it's in Format, so it automatically works with the Platform including the Menu and Backup Utility.


Mozilla Thunderbird, Portable Edition is available for immediate download from the Mozilla Thunderbird, Portable Edition Test homepage. Get it today!

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John T. Haller's picture

The Thunderbird 78.1.0 release is a stable release but is not yet being pushed out to existing portable or local users by or Mozilla. It will not work with existing Enigmail/GPG setups or many existing extensions. As such, we're releasing it on our Test channel for now for users to test out and report issues alongside their standard Thunderbird Portable installs. This release supports 32-bit and 64-bit dual mode and modern extension portablization. It's available in all locales that the main channel version is.

Sometimes, the impossible can become possible, if you're awesome!

John T. Haller's picture

You can and try to test it. Copy, don't move, though. That way you can test everything out.

Sometimes, the impossible can become possible, if you're awesome!

I understand that I can test it, but this is more of a foresight thing. In case of eg VSCode, I'm used to just moving the data folder from the old folder to the new one. That saves me time (it's instant) and reduces disc wear (because all it has to do is change the pointers). Copying is pretty tedious in both regards in comparison. And if it's inconsistent (i.e. problems might arise in the future) and needs to be tested by the user then that kinda defeats half the purpose of using portable software (having both the data and preferences persist throughout multiple systems/installs).

And also, bugs exist, and that's fine. My question was more of a "Did you, as the developer, intend for the Data folder to be moved/copied into the new version and have everything persist?"

John T. Haller's picture

It's supposed to, but I can not guarantee the behavior. Thunderbird may introduce forward-only changes in the profile again as they have before. Meaning that you can no longer move it back.

Make a backup to your local PC or another drive before moving it. You're moving your data between separate versions of Thunderbird with major breaking changes between them. The publisher is not yet pushing the new version out to end users, only to new or manual downloads. My local Thunderbird is still on 68.x. That's why this is appropriately in the Test channel. If you don't have a reason to specifically be using the new one, just stay on Stable.

Sometimes, the impossible can become possible, if you're awesome!

>Meaning that you can no longer move it back.

That is totally fine. I backup my programs pretty regularly as is. Was mostly concerned with being able to move forward, not back.

Thank you for explaining. After reading your reply, I think I'll either go with 68 instead or (for now) just wait on 60. Who knows, 78 might move to stable upgrade path in the not-so-distant future. Seems like the publisher does indeed suggest waiting.

John T. Haller's picture

I'd suggest upgrading to 68.x if you're still on the old 60.x release first. Some extensions could have issues.

Word is 78.2.0 will have the upgrade path for Enigmail to the build in GPG, but we won't know for sure until release. I think that's when Mozilla will start pushing it out to specific users as an upgrade.

Sometimes, the impossible can become possible, if you're awesome!