Changelog for Thunderbird 83

The following WebExtension API changes were introduced in Thunderbird 83.

compose

api compose

• type ComposeAttachment.size — The size in bytes of this attachment. Read-only.

contacts

api contacts

• type PropertyChange — A dictionary of changed properties. Keys are the property name that changed, values are an object containing oldValue and newValue. Values can be either a string or null.

menus

api menus

• type OnClickData.attachments — The selected attachments. The compose permission is required to return attachments of a message being composed. The messagesRead permission is required to return attachments of displayed messages.