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Checkbox Column
Requires Restart
Adds a custom column to Thunderbird's messages list (thread tree), making it easier to select multiple messages on devices with a touchscreen display.
Vietnamese Dictionary
Enables spell checking in Vietnamese with a wordlist based on Hồ Ngọc Đức’s Free Vietnamese Dictionary Project.
Reply to Multiple Messages
Requires Restart
Add menu commands for replying to multiple messages at the same time.
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.
Slovar za slovenski jezik
Toggle Folderpane View
Requires Restart
This addon provides a toolbar button for toggling between the "All" and "Favorite" views in the folderpane.
attachment column in search result list
Requires Restart
Show the column for attachments in search results list. General search (edit-> search -> search emails) does not show by default if a message has attachments.
This addon adds this column, just as in a normal folder view.
Mail Summaries
Requires Restart
Adds a summary of mail accounts and folders to replace the account central pane and the empty folder preview
WarnAttachment
WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.
One-by-One Forward
Requires Restart
Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.
ThunderStats! Your Thunderbird Statistics!
Requires Restart
Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!
Greek - English (US) Spelling dictionary
Combined Greek - English (US) spell checking dictionary for Firefox - Thunderbird - Seamonkey
Menu Filter
Requires Restart
Keep your menus in check by filtering out items you never use.
Mark All Read Button
Requires Restart
Adds toolbar buttons to Mark All emails as Read, Mark Thread as Read, and Goto Next Unread Thread.
QuoteCollapse
Requires Restart
Collapse and expand quotes.
Contributors: Stanimir Stamenkov, Dillinger
Zoiper Thunderbird Plugin
Requires Restart
It allows you to make calls via Zoiper from Mozilla Thunderbird.
Show Address Only
Requires Restart
Adds columns to display Sender/Recipients mailaddress only.
Český slovník kontroly pravopisu (bez diakritiky)
Slovník pro kontrolu pravopisu u textů bez diakritiky pro aplikace Mozilla
Opacus SugarCRM 6.2+ Thunderbird Integration Pro
Requires Restart
SugarCRM 6.2.0-8.x/SuiteCRM 7.x Integration for Thunderbird
Enables archiving of emails into SugarCRM and SuiteCRM from Thunderbird. Requires a purchased license key (you can request a trial from within the extension).
Opacus SugarCRM/SuiteCRM Thunderbird Extension
Requires Restart
Enables the archiving of emails into SugarCRM/SuiteCRM from Thunderbird 3 and above.
To create your own collections, you must have a Mozilla Add-ons account.
