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.
Supernova substantialmente meliora le navigation per claviero de Thunderbird e accessibilitate del lector de schermo a transverso le           integre application. Nos ha alsi grandemente expandite le capacitate de navigar per contento e buttones del posta per le claves           TAB e flechas.