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Extra Format Buttons Requires Restart
Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.
Vietnamese Dictionary
Enables spell checking in Vietnamese with a wordlist based on Hồ Ngọc Đức’s Free Vietnamese Dictionary Project.
Tag Sequence Arranger Requires Restart
Enable you to arrange the tag sequences in their listbox.
Diccionario Ortográfico de Español Colombia
Este diccionario no constituye un diccionario de definiciones sino un diccionario destinado para la corrección ortográfica de Español Colombia (es-CO). Colombian spanish (es-CO) spellchecker.
Link Properties Plus Requires Restart
Provides extended link properties: size of linked file, last modified time, etc.
ThunderSync Requires Restart
Allows to synchronise Thunderbird's addressbook with external directories/files. Every contact is exported/compared with an external file. Right now, only vCard version 2.1 is supported as export file format.
XL2Report Requires Restart
Report und grafische Auswertung für Messungen mit dem XL2-Audio und Akustik Analyzer von NTi Audio
OpenMixTools Requires Restart
convert session files of yamaha consoles, print channel lists and reports
dictCheck Requires Restart
dictCheck - Double click on any english word in a page to get the polish meaning. Uses fast online dictionary.
Simple and easy! Enjoy!
Ethical signature Requires Restart
Add a button to the email composition toolbar, which lets you insert an ethical signature.
Check Domain Requires Restart
This extension is to display the warning dialog when you send mail for multiple domains.
Thunderbird Biff Requires Restart
This add-on provides a visual indicator of new Thunderbird mail availability in supported clients (Firefox, Sunbird) and Thunderbird itself. Note: you MUST install this add-on in BOTH Thunderbird and supported clients as there are both client AND ser...
Greek - English (US) Spelling dictionary
Combined Greek - English (US) spell checking dictionary for Firefox - Thunderbird - Seamonkey
Address Move Button Requires Restart
Allow you to add a Address Move Button to mail compose window.
Zindus Requires Restart
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
To create your own collections, you must have a Mozilla Add-ons account.