One of the best add-on u can use 'Ctrl+Space' to translate selected text on the page, that's what majority people need while reading some article in different language!

best in-page translator on Firefox

The best of its kind

Real lifesaver, best translator extension for firefox

정말 간단하고 쉬운 사용.

Thanks for your work!

quite a good add-on, i think perhaps this is the one of the best translating add-on in FF.

很好，类似chrome的翻译，选择后可以直接显示翻译结果

Easy to use

simple and quick, don't need additional click or open new webpages, which slow down the reading.