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 Thun...
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. Wh...
Who does Gen Z trust outside the algorithm?
This essay was originally published on The Sidebar, Mozilla’s Substack. When I started my newsletter, as seen on, a little over a year ago, it was because in the absence of early morning commutes, a designated office desk, and the water cooler conver...
Engage Your Inbox with ‘Getting Things Done’
David Allen’s “Getting Thing Done” (GTD) system has been around for longer than Thunderbird! First published in a book of the same name in 2001, this approach to productivity is focused on freeing your brain from chaos, giving it “focus, clarit...
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,...
Anthony Enzor-DeMeo Promoted to General Manager, Firefox
Mozilla has promoted Anthony Enzor-DeMeo to General Manager of Firefox. Since joining Mozilla in December 2024, Anthony has played a pivotal role in evolving Firefox’s strategy and championing a user-first approach to product development. His leaders...
State of the Thunder: Answering Community Questions!
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...
Welcoming New Faces to the Thunderbird Community Team
Community First Thunderbird is (and has always been) powered by the people. The project exists because of the amazing community of passionate code contributors, bug-bashers, content creators, and all-around wonderful humans who have stood behind it and...
VIDEO: Thunderbird 140.0 ESR “Eclipse”
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 provi...
A first-party data reality check
Part I in Anonym’s Rewiring the Rules Series First-party data — the kind users share willingly with brands they trust — is a marketer’s most valuable and precious asset. But often, when it comes time to activate that data in the form of an adve...
Let’s talk about data control
A new series exploring the connection between data protection and performance. The digital advertising industry is in a period of meaningful data use transition. An ecosystem that has fostered third-party cookies, device IDs, cross-site tracking, and m...
Mobile Progress Report – June 2025
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 w...
Why we can’t stop multitasking
We’ve all been there: a notification pops up, and suddenly we’re responding — even if it completely derails our focus. It feels automatic, but it’s rarely just about the task at hand. As a staff product researcher on the Firefox mixed methods t...
