Language Support


Google Translator for Firefox Requires Restart Featured

With this addon you can translate any text to your own language with one click or hot-key. You can either translate the selected text, this way the translated text will overwrite the original selected text, or you can translate the full page too.

Rated 4 out of 5 stars (354)
779,985 users

S3.Google Translator Requires Restart Featured

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (382)
373,176 users

Google Translate, ImTranslator, Dictionary, TTS Requires Restart Featured

ImTranslator translates text, words, webpages between more than 90 languages.
NEW: Inline Translator, Dictionary, access to Google Translate, Microsoft Translator. Unique on the fly localization.

Rated 4 out of 5 stars (463)
326,678 users

Quick Locale Switcher Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (88)
168,589 users

Grammarly for Firefox

Grammarly’s free spelling and grammar checker ensures that everything you type is easy to read, effective, and mistake-free. As you type, Grammarly underlines spelling mistakes and grammatical errors and helps you fix them on the fly.

Rated 3 out of 5 stars (53)
126,828 users

gtranslate Featured

With gtranslate you can translate any text in a web page just by selecting and right-clicking over it. The extension uses the Google translation services to translate the text.

Rated 4 out of 5 stars (520)
76,753 users

Seznam lištička Requires Restart

Seznam Lištička je vylepšení prohlížeče, které vám zpříjemní práci s internetem. Rychle vám přeloží slova, kterým nerozumíte a zjednoduší vám přístup do emailové schránky.

Rated 3 out of 5 stars (14)
61,897 users

Wiktionary and Google Translate Requires Restart

(former Google Dictionary and Google Translate)

In-line dictionary for any word you point to or double-click; whole page translation of any web page in another language.

Rated 4 out of 5 stars (213)
61,711 users

To Google Translate

Highlight text on a web page, right click and select To Google Translate for translate or play the previous text. EN-to-ES.

Marque un texto en una página web, de clic derecho y seleccione To Google Translate para traducir o reproducirlo. EN-a-ES.

Rated 5 out of 5 stars (11)
50,710 users

Locale Switcher Requires Restart

Displays a menu item for switching the application locale.

Rated 4 out of 5 stars (26)
48,312 users

Google™ Translator Lite Featured

a powerful tool to translate words or sentences

Rated 4 out of 5 stars (33)
45,625 users

rikaichan Requires Restart

Japanese to English/German/French/Russian dictionary. Just hover the mouse on top of a word, and a popup appears. Automatically de-inflects verbs and adjectives. Detailed kanji view...

Rated 5 out of 5 stars (92)
45,480 users

Rikaichan Japanese-English Dictionary File Requires Restart

This is a dictionary file add-on for the Rikaichan extension.

Rated 5 out of 5 stars (6)
39,976 users

新同文堂 (New Tong Wen Tang) Requires Restart

NewTongWenTang is a tool to switch display Chinese content between traditional and simplified glyphs (中文繁簡體互轉工具)

Rated 4 out of 5 stars (98)
33,443 users

Text to Voice Requires Restart TTS gives Firefox the power of speech. Select text, click the button on the bottom right of Firefox window and this add-on speaks the selected text for you. Audio is downloadable.

Rated 4 out of 5 stars (184)
28,144 users


LinguaLeo Translator is the most useful way to get translations of English words on any page online. Just click twice and you will get its translation. Our extension also allows you to translate any phrases.

Rated 3 out of 5 stars (109)
24,480 users

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (8)
21,353 users

Google Translate Menu

Simple Google Translate in Menu (Right Click)

Rated 4 out of 5 stars (9)
21,069 users

Dictionary Switcher Requires Restart

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (178)
19,500 users

Rikaichan Japanese Names Dictionary File Requires Restart

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (3)
17,425 users