"Dictionary (Google™ Translate) Anywhere" extension provides access to a floating multilingual Google Translate panel on any webpage.
Dictionary Switcher Requires Restart
Toggles dictionaries automatically or manually and displays the currently selected one
LEO Dictionaries Requires Restart
This is the official add-on for easier access to LEOs Online Dictionaries. Select any word or phrase, right-click on the selection and translate from/to English, French, Spanish, Italian, Chinese, Russian, Portuguese and Polish to/from German.
Selecting text and holding alt key, translated results will show up on current web pages. No need to leave current web pages. Translate results come from Google Translate.
The add-on uses dict.cc to translate words and phrases in any website, epub or pdf. In-page translation. No need to select the word, just click on it!
French grammar checker.
Included: conjugation tool, lexicographer, text formatter and spelling dictionaries.
Provide easy way to install Additional Language Packs.
Language Manager Requires Restart
Language Manager, Designed to manage language packs for Firefox web browsers this easy to use utility make it easy to manage installed language packs and always have the latest language pack installed.
German Spell Check Requires Restart
This is a spelling dictionary, where you can select a text in German, click on the icon (German flag) and get your text checked against spelling mistakes.
Translate entire web page or selected text using google translate
There are many translators on Firefox. There are two features they're not supported:
This addon can translate all pages you can open in firefox
Perapera Chinese Popup Dictionary Requires Restart
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!
A simple words and page translation tool by using Google Translate.
Online Translator Toolbar Requires Restart
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
Finnish spellchecker Requires Restart
Finnish open source Voikko-spellchecker for Mozilla and needed libraries.
Leo Search Requires Restart
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.
Translate words and expressions in context and improve your language skills. Spanish, French, Russian, Italian, etc.
DictionarySearch (Official Version) Requires Restart
Looks up a user selected word in an online...
gTranslator Requires Restart
Google translate gadget for firefox. This extension translates entire webpages into a language of your choice with one click. Idea comes from Google Translation Bar for Chrome.
Google™ Text-to-Speech is a text to speech engine with natural sounding voices.