Desktop Roadmap

Active

• Exchange (EWS, GraphAPI)Finalize the work on the Exchange protocol in order to support all versions of Exchange and Microsoft 365, including calendar and address book support.
• Global DatabaseContinue the work on the new Panorama database, allowing users to start testing the new database, and handle a consistent data migration.
• Improve and extend existing add-ons APIsImprove the currently available APIs, focus on giving access to new sections and core features, as well as introducing new APIs for specific sections.
• Encryption and Security ImprovementsImprove the support and discovery of OpenPGP and S/MIME, improve email tracking protection, and harden phishing email prevention. These will continue all year as we respond to high priority vulnerabilities, upstream changes, AI-powered sec reports and regressions. (Ongoing maintenance)
• Settings Interface ImprovementsClean up and reorganize the settings into more discoverable sections and improve its search. User survey will heavily influence the end result.
• Calendar Dialogs UI/UXComplete the refresh of the calendar interface and user experience. Some protocols handling changes might be needed.

Planned

• OAuth2 EnhancementsOAuth became a significant initiative due to evolving provider authentication requirements (including PKCE adoption), browser-based authentication improvements, and the need to deliver a seamless Thundermail sign-in experience.

Shipped

• First Time User Experience: Account HubComplete Account Hub for all account creations, enable it for first time users.
  March 2026
• Unobtrusive SignaturesThis was part of the larger “Encryption and Security Improvements” initiative and has been completed to reduce confusion around OpenPGP signatures.
  March 2026
• Exchange Email SupportFull support of email operations and account creation.
  November 2025
• Native OS NotificationsAdd quick actions to reply, delete, mark messages as read/unread, and manage the notifications.
  July 2025
• Implement Glean TelemetryMove away from the old telemetry implementation and add the new Glean Telemetry.
  April 2025
• In-App NotificationsImplement a new notification system that allows the Thunderbird team to push important, time-sensitive information directly to a user's Thunderbird desktop client.
  May 2025
• First Time User ExperienceWe had to refocus on the email onboarding section of the Account Hub due to Exchange, Graph, and Thundermail release. User feedback & telemetry data points at a large percentage of manual config usage, and the new protocols come with very complex manual user flows. First introduction of a 1-click setup OAuth for Thundermail.
  June 2026
• System add-on integrationAllowing to ship ad-hoc features faster for objectives that supersede the release train. This will be in 153!
  June 2026