Changelog for Thunderbird 149

The following WebExtension API changes were introduced in Thunderbird 149.

api contacts

• event onManyCreated — Fired when a large number of contacts are added. The contacts are not emitted for performance reasons. The event indicates significant changes, and consumers should rebuild any cached representation of the address book.

api tabs

• type Tab.splitViewId — The ID of the Split View that the tab belongs to. -1 if the tab does not belong to a split view.