Add-ons
Newest Extensions
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CrossBorderScam-Canceler
This add-on (CrossBorderScam-Canceler) filters fraudulent emails by focusing on the location of the received email and analyzing the header information of the opponent's email and the links in the email body.(view in English, Japanese or German)
Email Original
El sello que permitirá a tus destinatarios de tus correos electrónicos, validar la autenticidad y legitimidad de tus direcciones de correo electrónico, poniendo esa necesaria barrera a las posibles suplantaciones de identidad (phishing ó spoofing).
Inbox Actions
Inbox Actions add convenient interactions to messages allowing users to interact with an product or service all without the user even having to open their email.
Max Image Width
Limit all images in all messages to the message pane width.
Thunderbird-CloudLink
Inserting file link to mail with optional password and expiration date
ThunderSearch
Open a Google search browser window in Thunderbird from the context menu
Webpage Print from Context Menu
Print the current webpage from the context menu
Webbuttons - Google Messages Web
Adds a button in the toolbar for Google Messages Web. Icon source: https://www.flaticon.com/free-icon/comment_9449200
ThunderCalc
A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.
TriliumClipper
A Thunderbird extension to clip messages and send them to the TriliumNext note taking application.
Interstellar Alliance Social Experiment Step 3
Send the Interstellar Alliance Social Experiment Step 3 letter as an email to a predefined online list of recipients.
Email Cleaner
Email Cleaner is an extension that allows you to delete emails from specific senders or specific subjects older than a certain number of days. The plugin is multilingual.
SpaceHey - Quick Access
Quick Access to SpaceHey in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
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.
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.
Custom Headers View
Display custom email headers in the mail header toolbar. This extension allows you to make visible specific headers in the toolbar, like received, date, DuckDuckGo's duck-original- headers to show the sender's email in the original format, etc.
BulkDelete
Thunderbird MailExtension designed to help you efficiently bulk delete emails with multiple filtering options.
AI Email Assistant
Automatically generate email responses using AI through an external API integration. This add-on sends emails to an API and inserts the AI-generated response into your reply.
New UNEC
New UNEC is a browser extension that transforms the UNEC student panel into a modern and user-friendly interface. It dynamically replaces the existing webpage’s HTML, CSS, and JS with an improved design, featuring automatic dark mode, language.
To create your own collections, you must have a Mozilla Add-ons account.
