Add-ons
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Check your emails for spelling and grammar issues78,982 users -
Web Translate is easy to use translator for your Web browser / Thunderbird!58,075 users -
A Magyar Ispell helyesírási szótár a Hunspell helyesírás-ellenőrző programhoz készített nyílt forráskódú magyar szótár.9,343 users -
Australian English Dictionary for Mozilla applications.8,562 users -
![Icon for Grammalecte [fr] (for Thunderbird)](https://addons.thunderbird.net/user-media/addon_icons/809/809689-32.png?modified=1602750472)
Correcteur grammatical dédié à la langue française. Inclus : conjugueur, formateur de texte et dictionnaires orthographiques.7,444 users -
Diccionario corrector ortográfico de Español/México7,065 users
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Word translation in tooltip with English⟷Croatian dictionary already incorporated.0 users -
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.256 users -
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.14 users -
CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.0 users -
Ћирилично/латинично пресловљавање, виртуална ћирилична тастатура - Serbian Cyrillic/Latin transliteration and Virtual Cyrillic keyboard0 users -
An easier management of the user interface language41 users
Recently Added See all »
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AI-powered email assistant for Thunderbird. Write, polish, and translate emails. Get smart summaries of unread messages. Works with OpenAI, DeepSeek, or custom providers.4 users -
Check your email with Gemini AI before sending.
A Thunderbird add-on that uses Google's Gemini AI to review your emails before sending. Get intelligent feedback on spelling, grammar, tone, clarity, and potential issues.45 users -
Traduisez vos mails en un clic via l'API DeepL (ou Google Translate en backup).39 users -
Autotext blocks using hotkeys. Translate email Text into 14 Language with one Hot Key "CTRL ALT T" Inside your email ask AI to write something for you. Help and instructions in the settings window.23 users -
Simple and fast Thunderbird extension: select any text, right-click, and correct it instantly. Perfect for improving your emails in one step, without opening any external tool. Lightweight, convenient, and highly effective.10 users
See all 107 extensions in Language Support »
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