Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.
Insert smilies in messages.
Transliterator No Restart
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.
True "Send Later" functionality to schedule the time for sending an email.
Mail Merge Featured
Mass Mail and Personal Mail
Address Widget Lines provides the ability to select the number of address lines to display in the message compose window.
Write your email in Markdown, then make it pretty.
Automatic Dictionary No Restart
Extension that remembers the language of the spellchecker used when composing and switches to it every time you write to that person.
An input method editor (IME) for Vietnamese. Type Vietnamese diacritics directly into any Web page, Web app, or dialog box.
Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, và hộp thoại.
Save frequently-entered text for pasting later.
Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.
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.
Category manager for CardDav contacts, also allows to send an email to all members of a category (categories can be used as contact groups).
Check the message contents and addresses before you send the message...
Adds a button to send an email and archive the original message.
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!
Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).
This function can be invoked by "Forward to Evernote" in the context menu.
Easily and quickly to encrypt / decrypt
For users: private messages via e-mail, blogs, social networks, forums, etc.
For webmasters: websites, images, photos, etc.
Support: Firefox, Thunderbird and SeaMonkey
Allows to convert large attachments to links automatically without 3rd party providers.
Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.