Add-ons
Message Composition
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ThunderHTMLedit
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.
*cloud - FileLink for Nextcloud and ownCloud
Featured
Upload large attachments to your Cloud and send the link by email
Address bulk copy （アドレス一括コピー）
Requires Restart
Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
それを実現するためのアドオンです。
Stop Ignoring Reply:To
Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
Send Later
Requires Restart
True "Send Later" functionality to schedule the time for sending an email.
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Transliterator
As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.
Identity Chooser
Identity Chooser helps you to always use the correct identity when composing a new email.
Single Domain
Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.
AVIM
Requires Restart
Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
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Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.
ReplyWithHeader
Automatic Dictionary
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
SmartTemplate4
Requires Restart
Featured
SmartTemplate⁴ offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.
Reply to Multiple Messages
Requires Restart
Add menu commands for replying to multiple messages at the same time.
ThunderPEC
Requires Restart
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
Owl for Exchange
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
Custom Address Sidebar
Color Text Compose Buttons
Requires Restart
Adds Text Color Buttons in Compose Toolbar and More: Pixel FontSize, Strikethough, Sub & Superscript, Lower & UpperCase. Also provide Tools: Insert iframe, Launch MathType, Maths & Greek Symbols, Load Template Variables and Duplicate Compose Window.
To create your own collections, you must have a Mozilla Add-ons account.
