Changelog for Thunderbird 114
The following WebExtension API changes were introduced in Thunderbird 114.
messageDisplay
api
messageDisplay
function open.openProperties.file — The DOM file object of a message to be opened.
messages
api
messages
function openAttachment — Opens the specified attachment.
spaces
api
spaces
The spaces API allows to manage built-in and custom spaces, and to add buttons for custom spaces to Thunderbird’s spaces toolbar.
tabs
api
tabs
event onActivated.activeInfo.previousTabId — The ID of the tab that was previously active, if that tab is still open.