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Google Translator for Firefox

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 (306)
39,148 weekly downloads

S3.Google Translator 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 (206)
21,203 weekly downloads

ImTranslator - Google Translator, Dictionary, TTS

MORE THAN 22 MILLION DOWNLOADS
ImTranslator provides translation powered by Google Translate, Microsoft, Babylon for 70+ languages. It includes Translator, Dictionary, Text-to-Speech, Back Translation.
Video Tutorial: http://youtu.be/qyLyFkQuMGU

Rated 4 out of 5 stars (423)
20,902 weekly downloads

Easy Google Translate No Restart

Translate selected text on current web pages. Support translate over 40 languages. Translate results come from Google Translate.

Rated 3 out of 5 stars (35)
5,914 weekly downloads

Google™ Translator Lite No Restart Featured

Google™ Translator Lite

Rated 4 out of 5 stars (17)
5,510 weekly downloads

Wiktionary and Google Translate

(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 (173)
4,492 weekly downloads

To Google Translate No Restart

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 3 out of 5 stars (19)
3,968 weekly downloads

gtranslate No Restart 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 (480)
3,799 weekly downloads

WordReference Translator

Open a tab with WordReference's translation for the selected word. Through a floating link, or by pressing "D" key.

Rated 3 out of 5 stars (31)
2,342 weekly downloads

Quick Locale Switcher

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 (81)
2,173 weekly downloads

Text to Voice Featured

http://en.wikipedia.org/wiki/Text-to-voice. 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. Isn't it brilliant? Audio is downloadable.

Rated 5 out of 5 stars (164)
2,149 weekly downloads

translator

translator is web translation extension that allows you to translate any web page or text into nearly any language at the click of a button.

Rated 4 out of 5 stars (96)
2,021 weekly downloads

Rikaichan Japanese-English Dictionary File

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

Rated 5 out of 5 stars (5)
1,510 weekly downloads

rikaichan

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 (88)
1,431 weekly downloads

新同文堂 (New Tong Wen Tang)

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 (96)
1,390 weekly downloads

Leo Search

Searches for marked words in the database at dict.leo.org and opens the result in a new background tab. It supports all languages provided by leo.org. Press "Ctrl" key to open the search result in a new foreground tab.

Rated 4 out of 5 stars (19)
1,280 weekly downloads

Locale Switcher

Displays a menu item for switching the application locale.

Rated 4 out of 5 stars (25)
1,254 weekly downloads

Perapera Japanese Popup Dictionary

Put your mouse over any Japanese words on a webpage and it gives you the pronunciation and definition. English, German, French, and Russian dictionaries; Save and export words for studying later!

Rated 5 out of 5 stars (41)
1,240 weekly downloads

Euskalbar

Basque dictionaries. Euskalbar is a Firefox toolbar that helps translating words from Basque to English, French, German, Spanish, Japanese and Latin, and from English, French, Spanish, German, Japanese and Latin to Basque.

Rated 5 out of 5 stars (29)
1,160 weekly downloads

One Click Popup Dictionary

One click to quickly know the various English word definitions, IPA, pronunciation with audio - all in a pretty white popup at the top right of the browser, without affecting your browsing experience.

Rated 4 out of 5 stars (33)
1,128 weekly downloads