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Thunderbird Monthly Release 144 Recap

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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Thunderbird Monthly Development Digest: September 2025

Hello again from the Thunderbird development team! This month’s sprints have been about focus and follow-through, as we’ve tightened up our new Account Hub experience and continued the deep work on Exchange Web Services (EWS) support. While those two areas have taken centre stage, we’ve also been busy adapting to a wave of upstream platform […]

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Thunderbird Monthly Development Digest: August 2025

Hello again from the Thunderbird development team! As autumn settles in, we’re balancing the steady pace of ongoing projects with some forward-looking planning for 2026. Alongside coding and testing, some of our recent attention has gone into budgets, roadmaps, and setting priorities for the year ahead. It’s not the most glamorous work, but it’s essential […]

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Mobile Progress Report – July/August 2025

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 […]

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Thunderbird Pro August 2025 Update

In April of this year we announced Thunderbird Pro, additional subscription services from Thunderbird meant to help you get more done with the app you already use and love. These services include a first ever email service from Thunderbird, called Thundermail. They also include Appointment, for scheduling meetings and appointments and Send, an end-to-end encrypted […]

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Thunderbird Monthly Development Digest – July 2025

Hello again from the Thunderbird development team! As the northern hemisphere rolls into late summer and the last of the vacation photos trickle into our chat channels, the team is balancing maintenance sprints with ongoing feature-related projects. Whether you’re basking in the sun or bundled up for a southern winter, we’ve got plenty to share […]

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Monthly Release 141 Recap

We’re launching a brand new series that will highlight features and improvements with Thunderbird 141.0 – your front row ticket to Thunderbird’s monthly enhancements! (No more waiting in the wings so to speak). Learn what’s new, why it matters, and how it’ll transform your inbox experience. In March, we introduced a new monthly Release channel […]

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Thunderbird Monthly Development Digest – June 2025

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 […]

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Thunderbird Monthly Developer Digest – April 2025

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 […]

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Thunderbird Monthly Development Digest – March 2025

Hello again Thunderbird Community! It’s been almost a year since I joined the project and I’ve recently been enjoying the most rewarding and exciting work days in recent memory. The team who works on making Thunderbird better each day is so passionate about their work and truly dedicated to solving problems for users and supporting […]

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Thundermail and Thunderbird Pro Services

Today we’re pleased to announce what many in our open source contributor community already know. The Thunderbird team is working on an email service called “Thundermail” as well as file sharing, calendar scheduling and other helpful cloud-based services that as a bundle we have been calling “Thunderbird Pro.” First, a point of clarification: Thunderbird, the […]

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Thunderbird Monthly Development Digest – February 2025

Hello again Thunderbird Community! Despite the winter seeming to last forever and the world being in a state of flux, the Thunderbird team has been hard at work both in development and planning strategic projects. Here’s the latest from the team dedicated to making Thunderbird better each day: Monthly Releases are here! The concept of […]

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Thunderbird Monthly Development Digest – January 2025

Hello again Thunderbird Community! As January drew to a close, the team was closing in on the completion of some important milestones. Additionally, we had scoped work for our main Q1 priorities. Those efforts are now underway and it feels great to cross things off the list and start tackling new challenges. As always, you […]

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Thunderbird Monthly Development Digest – December 2024

Happy New Year Thunderbirders! With a productive December and a good rest now behind us, the team is ready for an amazing year. Since the last update, we’ve had some successes that have felt great. We also completed a retrospective on a major pain point from last year. This has been humbling and has provided […]

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