Very fast!
Very good extension if you use the addon button. It can detect the language, and translate fast. But if you need the context menu option, it simply doesn't work. Only the icon that appears when you select a word is working, it translates, but when you try to save the translated expression, it doesn't work ("adding to your phrase book")

I cannot put a totally bad review, since the addon button does the job perfectly, but please, add back a working "context menu", and the saving feature. It's only half working. It's a shame because it does very good translation and very very fast...

Please add this feature: I really want the extension to show only the few languages I use often, because it's too cluttered and hard to find them each time in a long list! It could be the best translation app here on the Mozilla addon site, if you fix the problems, and add a TTS.