• Development

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 an important opportunity for learning and improvement.

Exchange Web Services support in Rust

Prior to the team taking their winter break, a cascade of deliverables passed the patch review process and landed in Daily. A healthy cadence of task completion saw a number of features reach users and lift the team’s spirits:

• Copy to EWS from other protocol
• Folder create
• Enhanced logging
• Local Storage
• Save & manipulate Draft
• Folder delete
• Fix Edit Draft

Keep track of feature delivery here.

Account Hub

The overhauled Account Hub passed phase 1 QA review! A smaller team is handling phase 2 enhancements now that the initial milestone is complete. Our current milestone includes tasks for density and font awareness, refactoring of state management, OAuth prompts and more, which you can follow via Meta bug & progress tracking.

Global Database & Conversation View

Progress on the global database project was significant in the tail end of 2024, with foundational components taking shape. The team has implemented a database for folder management, including support for adding, removing, and reordering folders, and code for syncing the database with folders on disk. Preliminary work on a messages table and live view system is underway, enabling efficient filtering and handling of messages in real time. We have developed a mock UI to test these features, along with early documentation. Next steps include transitioning legacy folder and message functionality to a new “magic box” system, designed to simplify future refactoring and ensure a smooth migration without a disruptive “Big Bang” release.

Encryption

The future of email encryption has been on our minds lately. We have planned and started work on bridging the gap between some of the factions and solutions which are in place to provide quantum-resistant solutions in a post-quantum world. To provide ourselves with the breathing room to strategize and bring stakeholders together, we’re looking to hire a hardening team member who is familiar with encryption and comfortable with lower level languages like C. Stay tuned if this might be you!

In-App Notifications

With phase 1 of this project complete, we uplifted the feature to 134.0 Beta and notifications were shared with a significant number of users on both beta and daily releases in December. Data collected via Glean telemetry uncovered a couple of minor issues that have been addressed. It also provided peace of mind that the targeting system works as expected. Phase 2 of the project is well underway, and we have already uplifted some features and now merged them with 135.0 Beta.  Meta Bug & progress tracking.

Folder & Message Corruption

In the aftermath of our focused team effort to correct corruption issues introduced during our 2023 refactoring and solve other long-standing problems, we spent some time in self-reflection to perform a post mortem on the processes, decisions and situations which led to data loss and frustrations for users. While we regret a good number of preventable mistakes, it is also helpful to understand things outside of our control which played a part in this user-facing problem. You can find the findings and action plan here. We welcome any productive recommendations to improve future development in the more complex and arcane parts of the code.

New Features Landing Soon

Several requested features and fixes have reached our Daily users and include…

• More folder compaction fixes and performance improvements!
• Restructured and revamped Sourcedocs 
• Allow S/MIME signed drafts to load
• Fix for “Get Selected Messages” with “Leave Messages on Server” disabled.
• Dark theme improvements
• Localization problems in calendar printing
• and many more in release notes for beta.

As usual, if you want to see things as they land, and help us squash some early bugs, you can always check the pushlog and try running daily, which would be immensely helpful for catching things early.

See you next month after FOSDEM!

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Toby Pilling

Senior Manager, Desktop Engineering