CompactHeader 需要重新啟動 精選
Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. New beta version available from http://compactheader.mozdev.org/
允許重新導向 (亦稱為 "bounce") 郵件訊息至其他收件者。
CardBook 需要重新啟動 精選
A new Thunderbird address book based on the CardDAV and vCard standards.
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
Mail Merge 需要重新啟動 精選
Create and Save or Send Multiple Individual and Personalized Messages from a Draft