FoxLingo may not be much to look at, but this free extension for Firefox comes with all the tools you'll need to translate a text selection or even entire Web pages.
The toolbar itself stretches across your browser window. The shortcut buttons aren't very attractive, but you can choose what buttons you want to appear on the toolbar, including flags that represent different languages. Each shortcut button lets you choose from a long list of languages for translation. The number of possible language translations with this toolbar is astounding. During our tests, we were able to translate an entire Web page very quickly. While we found a few words on the Web page that didn't translate, it certainly didn't keep us from being able to read the information. Likewise, we were able to select specific text for a quick translation. The Services shortcut provided us with myriad reference and translation tools. To use the AutoTrans feature, you have to utilize FoxLingo's search engine, but it immediately converted a Web page from French to English for us during our test.
and this the complete main feature of this tool
Web Page Translation - Translates full web pages (over 3,000 different language pairs)
Text Translation - Translates text entered in the search box or selected on any web page
Auto Translation - Automatically translates websites by recognizing their domain
Language Resources - Over 90 language services (encyclopedias, text-to-speech, etc.)
Dictionary - High quality multilingual dictionary with Wikipedia included (powered by Babylon)
Grammar Check - Proofreads texts (grammar, spelling, punctuation and style)
Translated Search - Searches foreign pages using terms written in your language
Learning Languages - Over 100 links to language learning sites for a variety of languages
Freeware - FoxLingo is completely free for everyone, with no limitations
