Add-ons
Language Support
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Grammar and Spell Checker — LanguageTool
Check your emails for spelling and grammar issues
Web Translate
The best Translator for Thunderbird!
Supported translators:
Google Translate
Microsoft Translator
DeepL
Yandex
Яндекс Переводчик
Google 翻译
百度翻译
Grammalecte [fr] (for Thunderbird)
French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.
✨ Awesome Emoji Picker ✨
Modern, nice emoji picker that you can use to find and select emojis. It will be copied to your clipboard or even directly inserted into the e-mail, when you click on it.
You will certainly like it.
AI Anywhere for ChatGPT
Press "Alt + i" or use context menu to quickly access:
- ChatGPT (OpenAI)
- GitHub Copilot (Microsoft)
- Claude (Anthropic)
- T3 Chat
- Lumo (Proton)
- Gemini (Google)
- Grok (X)
- Mistral
- Perplexity
- DeepSeek (深度求索)
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.
BuxarTranslate
Translate text directly into Thunderbird.
Supports translation of selected text using Google Translate
Antidote connector for Thunderbird
Integrate Antidote with Thunderbird to proofread your emails, check your spelling and grammar, and consult the dictionaries and language guides. Get alerted to abrasive tone and missing attachments before sending a message.
Read Aloud: A Text to Speech Voice Reader
Read aloud the selected email messages using text to speech (TTS). Read Aloud is intended for users who prefer to listen to content instead of reading, and those with dyslexia or other learning disabilities.
Grammar, Proofreading & Spell Checker
Check the grammar and spelling directly inside Thunderbird using Wordeep technology
Hawk (Like ChatGPT in your emails)
Hawk for Thunderbird is an AI-powered plugin designed to generate clear and personalized emails, translate content, fix grammar errors, and streamline your email communication workflow.
Unicodify – Text transformer
Easily and quickly transform text to “Unicode fonts” and change the casing.
Thunderbird Translate
Thunderbird Translate adds a one-click translation banner to messages in Thunderbird. Translate an email's body (html or plain text) using the Gemini API and show the translated result at the top of the message.
Aify
Rewrite or generate text based on promps using OpenAI's API.
Configure on settings page (make sure to save) and start to use when writing your emails!
You must have a payment method on record with OpenAI and an API key. OpenAI charge for use.
AutoReplace
This AddOn offers a function of autocorrection / auto text replacement. You can save a shortcut and a replacement and it will replaced automaticly if you type your new eMail text.
10ten Japanese Reader (Rikaichamp)
Look up Japanese words with the hover of a mouse.
After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.
Text Insert: Templates/Instant Spell Check
Email composer:
*Upper case the first letter of names or words at sentence start
*Insert styled text, images, tables with shortcuts
*Android(TM) like spellcheck/suggest alternatives (DE, EN, ES, FR,NL)
*Templates for XNote++, Nostalgy++, ES
To create your own collections, you must have a Mozilla Add-ons account.
