A Thunderbird add-on that adds an Undo and an Redo button to the compose window
Version: 1.1.13The UndoRedo extension adds "Undo" and "Redo" toolbar buttons to Thunderbird's Compose message window.
Operating System: Mac OS X
You can place these buttons anywhere you like by dragging them from the Customize Toolbar window.
Language support included: en-US, de-DE, es-ES, fr-FR, it-IT, ja-JP, nl-NL, pl-PL, pt-BR, ru-RU