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X-Original-To Column
This addon adds a new column called X-Original-To in the message list which shows the original recipient address of the message (the contents of the X-Original-To header). This can be useful for systems with catch-all email addresses.
XL2Report
Requires Restart
Report und grafische Auswertung für Messungen mit dem XL2-Audio und Akustik Analyzer von NTi Audio
XML Digital Signature Tool
Requires Restart
XML Digital Signature Tool is a Firefox add-on for processing Digital Signature in XML documents
(Please read the installation instruction in the "Developer Comments" section before downloading)
xmpp4moz
Requires Restart
xmpp4moz integrates the XMPP protocol (also known as Jabber) into Mozilla applications.
XNote++
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.
XPCOMViewer
Xpunge
Empties the Trash and Junk folders, and compacts folders in multiple Thunderbird accounts.
XRechnung-Viewer
Zeigt eine Zusammenfassung von XRechnungen / ZUGFeRD-Rechnungen der ausgewählten E-Mail (Attachments) an. Außerdem stellt es einen Bezahlcode (QR-Code) dar, der mit entsprechender App eine Überweisung mit den Daten aus der Rechnung auslöst.
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.
XUL/Migemo
Requires Restart
This provides dictionary-assisted search (Migemo search) and regular expression powered search for "find in this page" and other features.
xultray for gecko 1.9.1
Requires Restart
Show xul application (gecko 1.9.1 based) in system tray. supports Firefox 3.5, Thunderbird 3.0.
xultray for gecko 1.9.2
Requires Restart
Show xul application (gecko 1.9.2 based) in system tray. supports Firefox 3.6 / 3.7 , Thunderbird 3.1
Yandex Mail - Quick Access
Quick Access to Yandex.Mail in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
Yandex.Metrika for Thunderbird
yangben dictionnary
Year viewTo create your own collections, you must have a Mozilla Add-ons account.
