Add-ons
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Check your emails for spelling and grammar issues84 145 users -
The best Translator for Thunderbird!
Supported translators:
Google Translate
Microsoft Translator
DeepL
Yandex
Яндекс Переводчик
Google 翻译
百度翻译61 081 users -
A Magyar Ispell helyesírási szótár a Hunspell helyesírás-ellenőrző programhoz készített nyílt forráskódú magyar szótár.9 386 users -
Australian English Dictionary for Mozilla applications.8 134 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.7 691 users -
Diccionario corrector ortográfico de Español/México7 167 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.254 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.11 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 language31 users
Recently Added See all »
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Automatically switch compose spellcheck dictionaries using fast Markov-style language detection.4 users -
Underlines the mistakes a LanguageTool server reports in the compose window. You choose the server, and nothing is ever sent to any other third-party service.4 users -
Insert any of 682 accented letters into a message as you write it, from a searchable popup in the compose window. Works offline: nothing is sent anywhere and no data is collected.2 users -
Εμφάνιση ελληνικών χαρακτήρων σε emails από το ΕΚΔΔΑ που δεν αποκωδικοποιούνται σωστά.0 users -
Translate the message you are reading or your own reply into your language using Google, Microsoft, DeepL, or Yandex. Bring your own API key.129 users -
AI bilingual email translation: original and translated paragraphs side by side, streaming, 4 view modes. Uses your own OpenAI/DeepSeek/Claude/Ollama endpoint; keys encrypted on-device, mail goes only to your provider. No data collection.1 user
See all 123 extensions in Language Support »
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