We’re back with our Monthly Release recap! Thunderbird 144.0 readies the way for Exchange Web Services support, makes reordering your folders easier, and adds a new UI for TLS certificate handling. Additionally, we’ve fixed a dark mode toggle bug for High Contrast Mode users. A quick reminder – these updates are for users on our […]

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Welcome back to our thirteenth episode of State of the Thunder! Nothing unlucky about this latest installment, as Managing Director Ryan Sipes walks us through how Thunderbird creates its roadmap. Unlike other companies where roadmaps are driven solely by business needs, Thunderbird is working with our community governance and feedback from the wider user community […]

The post State of the Thunder 13: How We Make Our Roadmap appeared first on The Thunderbird Blog.

The past twelve months have been another remarkable chapter in Thunderbird’s journey. Together, we started expanding Thunderbird beyond its strong desktop roots, introducing it to smartphones and web browsers to make it more accessible to more people. Thunderbird for Android arrived in the fall and has been steadily improving thanks to our growing mobile team, […]

The post State Of The Bird 2024/25 appeared first on The Thunderbird Blog.

Hello wonderful community, it has been a while since the last Mobile update. A lot has happened in the past 2 months, so let’s jump right into a quick overview of current work in progress and primary efforts. Account Drawer in progress If you’re rocking the Beta version of Thunderbird for Android, you might have […]

The post Mobile Progress Report – July/August 2025 appeared first on The Thunderbird Blog.

Welcome back to the latest season of State of the Thunder! After a short break, we’re back and ready to go. Michael Ellis, our Manager of Community Programs, is helping Alessandro with hosting duties. Along with members of the Thunderbird team and community, they’re answering your questions and keeping everyone updated on our roadmap progress […]

The post State of the Thunder: Mozilla Connect Updates appeared first on The Thunderbird Blog.

Welcome back to another edition of the Community Office Hours! This month, we’re taking a closer look at accessibility in the Thunderbird desktop and mobile apps. We’re chatting with Rebecca Taylor and Solange Valverde, members of our designer, about a recent accessibility (often shortened as a11y) study. We wanted to find out where Thunderbird was […]

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For the past few months, we’ve been talking about our roadmaps and development and answering community questions in a video and podcast series we call “State of the Thunder.” We’ve decided, after your feedback, to also cover them in a blog, for those who don’t have time to watch or listen to the entire session. […]

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Welcome back to another edition of the Community Office Hours! This month, we’re taking a closer look at Thunderbird 140.0 ESR “Eclipse,” our latest Extended Support Release! Sr. Manager of Desktop Engineering Toby Pilling (who so helpfully provides the Thunderbird Monthly Development Digest) is walking us through the latest Thunderbird. He’ll let us know what’s […]

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Welcome back to another update on how things are going on mobile.  Thunderbird for iOS We’ve been going back and forth between database and JMAP for Thunderbird for iOS. Most of the visible work has flown into creating an initial JMAP library that we can use to access the parts that we need from Thunderbird […]

The post Mobile Progress Report – June 2025 appeared first on The Thunderbird Blog.

Hello once more from the Thunderbird development team! For many of our team members, the summer has started with our annual sprint to release ESR and enjoy a little time afk, as our colleagues in the southern hemisphere hunker down for winter and power through a pile of work down under. Extended Support Release is […]

The post Thunderbird Monthly Development Digest – June 2025 appeared first on The Thunderbird Blog.

Thunderbird for iOS We’re growing a few more stars! We’re so happy to hear there is great interest in Thunderbird for iOS, and hope to reach a stage soon where you all can be more involved. Thank you, also, to those of you who’ve submitted an increasing number of ideas via Mozilla Connect. Todd has […]

The post Thunderbird Mobile Progress Report: May 2025 appeared first on The Thunderbird Blog.

Here is an update of what Thunderbird’s mobile community has been up to in April 2025. With a new team member, we’re getting Thunderbird for iOS out in the open and continuing to work on release feedback from Thunderbird for Android. The Team is Growing Last month we introduced Todd and Ashley to the MZLA […]

The post Thunderbird for Mobile April 2025 Progress Report appeared first on The Thunderbird Blog.

Hello from the Thunderbird development team! With some of our time spent onboarding new team members and interviewing for open positions, April was a fun and productive month. Our team grew and we were amazed at how smooth the onboarding process has been, with many contributions already boosting the team’s output. Gearing up for our […]

The post Thunderbird Monthly Developer Digest – April 2025 appeared first on The Thunderbird Blog.

Hello, everyone, and welcome to the Thunderbird for Android March 2025 Progress Report. We’re keeping our community updated on everything that’s been happening in the Android team, which is quickly becoming a more general mobile team with some recent hires. In addition to team news, we’re talking about our roadmap board on GitHub. Team Changes […]

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In this month’s Community Office Hours, Laurel Terlesky, Design Manager, is talking about the new Thunderbird Design System. In her talk from FOSDEM, “Building a Cross-Platform, Scalable, Open-Source Design System,” Laurel describes the Thunderbird design journey. If you are interested in how the desktop and mobile apps have gotten their new look, or in the […]

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UPDATE (March 4, 2025): The Release Channel is now default! See our update post on how to make the switch with a manual install and what’s new in 136. We have an exciting announcement! Starting with the 136.0 release in March 2025, the Thunderbird Desktop Release channel will be the default download. If you’re not […]

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Thunderbird’s rich history comes with a complex community of contributors. We care deeply about them and want to support them in the best way possible. But how does a project effectively do just that? This article will cover a project and partnership we’ve had for most of a year with a company called Bitergia. It […]

The post Open Source, Open Data: Visualizing Our Community with Bitergia appeared first on The Thunderbird Blog.

It’s been a while since our last update in August, and we’re glad to be back to share what’s been happening. Over the past few months, we’ve been fully focused on the Thunderbird for Android release, and now it’s time to catch you up. In this update, we’ll talk about how the launch went, the […]

The post Thunderbird for Android November 2024 Progress Report appeared first on The Thunderbird Blog.

Hello Thunderbird Community! Another adventurous month is behind us, and the team has emerged victorious from a number of battles with code, quirks, bugs and performance issues. Here’s a quick summary of what’s been happening across the front and back end teams as some of the team heads into US Thanksgiving: Exchange Web Services support […]

The post Thunderbird Monthly Development Digest – November 2024 appeared first on The Thunderbird Blog.

For the past two decades, I’ve been trying to get on Jeopardy. This is harder than answering a Final Jeopardy question in your toughest subject. Roughly a tenth of people who take the exam get invited to auditions, and only a tenth of those who make it to auditions make it to the Contestant Pool […]

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Last month we had a great chat with two members of the Thunderbird Council, our community governance body. This month, we’re looking at the relationship between Thunderbird and our parent organization, MZLA, and the broader Mozilla Foundation. We couldn’t think of a better way to do this than sitting down for a Q&A with Mark […]

The post VIDEO: Q&A with Mark Surman appeared first on The Thunderbird Blog.

We’re back with another contributor highlight! We asked our most active contributors to tell us about what they do, why they enjoy it, and themselves. Last time, we talked with Arthur, and for this installment, we’re chatting with Toad Hall. If you’ve used Support Mozilla (SUMO) to get help with Thunderbird, Toad Hall may have […]

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Hello Thunderbird Community! I’m Toby Pilling, a new team member and I’ve spent the last couple of months getting up to speed, and have really enjoyed meeting the team and members of the community virtually, and some in person! September is now over (and so is the summer for many in our team), and we’re […]

The post Thunderbird Monthly Development Digest: September 2024 appeared first on The Thunderbird Blog.

We’ve just released Thunderbird version 128, codenamed “Nebula”, our yearly stable release. So with that big milestone done, I wanted to take a moment and tell our community about the state of Thunderbird. In the past I’ve done a recap focused solely on the project’s financials, which is interesting – but doesn’t capture all of […]

The post State Of The Bird: Thunderbird Annual Report 2023-2024 appeared first on The Thunderbird Blog.