random(signature) Requires Restart
Updates a given signature file in regular intervals.
EasyRight2Left Requires Restart
Change direction from Left to Right and Right to Left for Persian, Arabic, Hebrew etc. This Thunderbird extension is based on ComposeRTF available in https://addons.thunderbird.net/en-US/thunderbird/addon/composertf/
Resubmit Requires Restart
(Re)submit multiple messages to a predefined recipient(s)
Highlight External Addresses Requires Restart
This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.
Replace placeholders with date and time as you type.
Tategaki Requires Restart
Tategaki allows vertical writing-mode on mail compose window.
replyTo Requires Restart
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
CodeHighlight Requires Restart
highlight code in email.
Smart Quotes Requires Restart
Enables “Smart” Quotes for Thunderbird Email
HtmlHighlightr Requires Restart
Provides source code highlighting in editor's "Insert HTML" dialog.
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
Patch to Alert Invalid Addresses Requires Restart
Shows alert if there is any invalid address in sending message.
Asciidoctor for Thunderbird Requires Restart
Type some text in your mail's body, hit the asciidoctor button and transform your mail into a pretty html5 asciidoctor document. Font awesome and code highlighting are enabled.
AVIM Requires Restart
Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.
~okeanos for Filelink Requires Restart
Add ~okeanos support to Thunderbird's Filelink feature.
Copiar Assunto Requires Restart
Adiciona um botão para copiar o Assunto do email selecionado para a área de transferência
Add a button to copy the Subject line of the selected email to the clipboard
Lovebird Requires Restart
Email organized around the people you care about.
Posting Style Enforcer Requires Restart
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.
Sensitivity Header + SPX Requires Restart
Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
Forked from another add-on developed by ff_bob, added SPX header for Sophos security appliances
BccBlocker Requires Restart
A ThunderBird extension to prevent the use of the Bcc field.
Bcc is the worst thing ever.
It kills transparency inside an organization.
If you use the Bcc feature, you should ask yourself why..