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Undo Button
Paste code
Thunderbird addon creating a context menu option that pastes code beautifully in HTML messages
Render Markdown Messages
This extension renders markdown-formatted messages as rich text. It preserves the fonts and formatting of plain text messages but adds support for markdown features like lists, code blocks, etc.
tbhints
Link hints for messages
This addon adds a keybinding (ctrl+shift+E) for displaying hints next to each link in an email message. Enter the hint text into the box at the bottom of the message to open that link in the system's default web browser.
Spellchecker Ladin (Val Badia)
eMail Address Finder
This finds all email addresses in Body, From, & CC fields.
It will then put them all into a single menu.
You can click on the menu & copy the address.
For those wrangling email addresses all day, it's a massive time saver.
TriliumClipper
A Thunderbird extension to clip messages and send them to the TriliumNext note taking application.
Tamizha Spellchecker
Requires Restart
Tamil spell checker derived from the OpenOffice spellchecker created by Tamizha Team
Uyghur Spelling Dictionary (ئۇيغۇرچە ئىملا لۇغەت)
Uyghurche Imla Lughet ئۇيغۇرچە ئىملا لۇغەت
Enables spell checking in any text field for Uyghur Arabic Alphabet.
BorderColors D
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
ansitel Click-to-Dial
This plugin will call a selected number by clicking the right mouse button.
Mark Subfolders Read
Adds a context option to folders for marking all contents of the selected folder and all subfolders as read.
AutoZoom
Gemini Proofreader
This extension uses Gemini Flash 2.0 to proofread emails when the user clicks the extension icon.
Usage requires a Gemini API key. There is a free usage tier that should be more than adequate for almost every user.
OpenAI Proofreader
This extension uses OpenAI gpt-4o-mini to proofread emails when the user clicks the extension icon.
Usage requires an OpenAI API key. OpenAI does not offer a free usage tier. Proofreading a 4-5 paragraph email costs a fraction of a cent.
ThunderCalc
A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.
DS-BCC
Data protection extension, to avoid data mishaps with circular mails:
1. warning for e-mail with multiple recipients not in BCC (exceptions possible)
2. warning for roundmails with a different recipient domain
3. warning if PGP key is present
Search for
Context menu on message allowing quick filtering based on email/sender or domain
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