Dynamic Unified Toolbar
Supernova features a single dynamic toolbar, presenting frequently used and contextual options based on the tab or Space that is currently active. Take full control by customizing the toolbar and window layout to perfectly fit your workflow.
More than just a refreshed set of graphics, Supernova introduces beautiful icons with a more consistent visual style unique to Thunderbird. Our new designs remain sharp and pixel-perfect at any density setting.
Easy Density Control
Working with multiple monitors and display resolutions? Supernova lets you dial in the perfect density settings and font sizes for the entire application, with just a single click from the App Menu.
New + Sortable Folder Modes
Supernova gives you more control by introducing sortable Folder Modes. Display all of your Tags in the Folder Pane, turn on and off Local Folders, or move your favorite Folder Mode sections up and down with one click. Less scrolling, more productivity.
Modernized Cards View
Supernova’s new Card View is our version of the well-known vertical layout for the Message List, perfect for people used to modern webmail. Card View emulates a mobile interface list with multi-line support, offering a more comfortable appearance to reduce cognitive burden.
Improved Address Book
Supernova continues to iterate on the modernized Address Book introduced in Thunderbird 102. You’ll enjoy a new tabular view, an improved Edit view, delete buttons, and better accessibility.
Supernova substantially improves Thunderbird’s keyboard navigation and screen reader accessibility across the entire application. We’ve also greatly expanded the ability to navigate Mail content and buttons using the TAB and arrow keys.
Improved Calendar Design
As part of an ongoing effort to modernize and upgrade Thunderbird’s Calendar, Supernova introduces an improved “mini-month” layout, improvements to the day/week/month grid, a pleasing color palette, and several more minor changes.
More to come!
Supernova is constantly evolving. Throughout the next year, we’ll deliver many improvements to existing Supernova features and introduce brand new ones. Upgrade to version 115 and experience the future of Thunderbird!