Add-ons
Message and News Reading
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XNote++
Featured
Persistent sticky notes associated to emails. You can fulltext search with constraints/email them/print/bookmark/copy to clipboard.
If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.
xSearchbarT2
Requires Restart
Somewhere between Thunderbird 1.5 and Thunderbird 2 the message search bar disappeared. This extension restores the search bar. Thunderbird 2 and newer only.
Zendesk Widget
Requires Restart
Provides a simple integration with Zendesk by displaying some information about the ticket when you open the notification mail for the ticket
This extension is not affiliated with Zendesk in any way. The Zendesk logo is (c) by Zendesk.
Zhong Wen
Requires Restart
Mouse over a Chinese character to find out it's meaning. A popup will appear showing the 'Pinyin' pronunciation, the simplified character form, and the English translation. You can customize what parts to show on the preferences window.
Zivver for Thunderbird
This extension automatically detects Zivver messages and decrypts them on-the-fly using the Zivver API. Messages are decrypted only when actively displayed by the user and are never stored locally.
Zoom Button for Thunderbird
Requires Restart
Zoom in, zoom out, and reset zoom with one toolbar button. Works in the Compose window too.
[Un]read
Requires Restart
This Thunderbird extension adds a button (plus keyboard shortcut) which allows for quickly switching between the 'view all'/'view unread' message filters. Moreover, if you are in the 'view unread' mode and you start...
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