Mozilla Thunderbird Update 137 has been launched with improved mail folder management

Thunderbird has launched update 137, introducing several enhancements, including improved mail folder management for Windows and temporarily disabling the system tray icon for Linux. Accessibility is enhanced with better support for high contrast mode, aiding visually impaired users.

Additionally, a bug affecting replies from local or unified folders with hidden message panes has been fixed. Performance improvements include faster opening of .eml files and smoother handling of large message volumes.

The update also enhances threaded search views and RSS feed scrolling for improved navigation and reading. The user interface has been refined with cleaner menu interactions and consistent visual formatting in message lists, leading to a more polished user experience. Security is strengthened with updates to OpenPGP key handling and message security. Stability improvements address crashes during shutdown searches and errors with mail import and corrupt address book databases.