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LinguaLeo No Restart

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 4 out of 5 stars (33)
18,336 users

Google translate for https/http No Restart

Translate entire web page or selected text using google translate
There are many translators on Firefox. There are two features they're not supported:
1.HTTPS pages
2.Page logined
This addon can translate all pages you can open in firefox

Rated 3 out of 5 stars (10)
18,053 users

www.Translate

Multi-Translator from Google, Bing and Pragma.
Translation tool for your Firefox and Thunderbird with a simple and friendly interface.

Rated 4 out of 5 stars (18)
16,687 users

Online Translator Toolbar

Free Online Translator Toolbar help you to translate whole web page, selected text on web page or text from Clipboard using one of free online translate services. Also you can translate single words using one of free online dictionaries

Rated 4 out of 5 stars (45)
15,168 users

Language Pack Install Helper No Restart

Provide easy way to install Additional Language Packs.

Rated 5 out of 5 stars (7)
14,852 users

Answers

Answers.com’s 1-Click Answers ™ saves you time by instantly delivering the information you’re looking for. Point at any word, hold the Alt key (Ctrl in Linux) and click. A pop-up will appear on the screen, explaining the term.

Rated 4 out of 5 stars (99)
14,420 users

Rikaichan Japanese Names Dictionary File

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (3)
13,100 users

DictionarySearch (Official Version)

Looks up a user selected word in an online...

Rated 4 out of 5 stars (105)
13,056 users

Babbel (Beta) No Restart

Behalte Deinen Lernerfolg im Blick mit der neuen Babbel (Beta) Firefox-Erweiterung.

Rated 3 out of 5 stars (1)
12,085 users

LEOs Dictionaries

This is the official add-on for easier access to LEOs Online Dictionaries. Simply select any word or phrase, right-click on the selection and translate from (to) English, French, Spanish, Italian, Chinese, Russian to (from) German

Rated 4 out of 5 stars (5)
11,727 users

Dict.cc Translation

Translate words and phrases via Dict.cc from within any website or epub.
No add-on is faster, easier or more precise!
Use via mouse gestures, rocker gestures, modifier + mouseclick or via context menu.
No need to select the word, just click on it!

Rated 4 out of 5 stars (16)
11,559 users

WikiLook

Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia.

Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus.

70+ languages supported!

Rated 5 out of 5 stars (122)
11,433 users

英辞郎 on the WEB

アルクのウェブサイト SPACE ALC( http://www.alc.co.jp/ )にて公開しているオンライン英和・和英データベース「英辞郎 on the WEB」を、その場で便利に検索できる Firefox アドオンです。ダブルクリック検索、範囲指定検索などのクイックサーチ機能もついています。有料版「英辞郎 on the WEB Pro」( http://eowp.alc.co.jp/info2/ )にも対応。
※「英辞郎」は道端早知子氏の登録商標です。

Rated 3 out of 5 stars (2)
11,389 users

Facebook Translate

Translate status updates and comments on Facebook. Seamlessly integrates into Facebook.

Rated 4 out of 5 stars (30)
11,179 users

Converter Featured

Contextual (inline) unit, timezone, and currency converter on any web site, plus custom conversions for offline text. Shopping assistant also included -- find the best deals online! (Currency conversions and shopping assistant disabled by default.)

Rated 5 out of 5 stars (54)
10,884 users

Perapera Chinese Popup Dictionary

Put your mouse over any Chinese words on a webpage and it gives you the pronunciation and definition. English, German, & French dictionaries; Pinyin and Zhuyin supported; Simplified or Traditional characters. Save and export words for studying later!

Rated 4 out of 5 stars (96)
10,842 users

Leo Search

Searches for marked words in the database at dict.leo.org and opens the result in a new tab. The fastest way to search at leo.org. It supports English, French, Spanish, Chinese, Italian and Russian to German translation.

Rated 4 out of 5 stars (15)
9,631 users

Dictionary Tooltip

Press ctrl+shift+K (or) double-click to see its meaning. This extension is ideal for those who doesn't like to switch their window to see the meaning of a word. ...

Rated 4 out of 5 stars (145)
9,462 users

Fast Translation

Easy tranlation tool using Google Translate. Select text and right click to translate. Press CTRL+SHIFT+L to open translation window.

Rated 5 out of 5 stars (58)
8,866 users

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 (27)
8,528 users