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This content covers features introduced in Thunderbird 7
Thunderbird 7 is based on Gecko 7.0. The Firefox 7 page has details on the significant changes to Gecko.
For helpful tips on updating existing extensions for Thunderbird 7, see Updating extensions for Firefox 7. There are several key changes that break compatibility with existing add-ons, so be sure to read that article.
Attachment objects in the reader (formerly
createNewAttachmentInfo) are now called
AttachmentInfo. Related functions (e.g.
saveAttachment) have been replaced with methods (e.g.