Good addon, but I accidentally switched to a "classic" style and there is no way to go back. I've even tried uninstalling and reinstalling it, and there's nothing in the addon options that refers to such a feature.
Great idea. Especially if If you get used to mobile translator UI. Really cheap and easy solution for non trivial problem. What is missing for me "one-click" - way to send piece of text from page to translator. But anyway it's pure 5. Addon doing exactly what is declared.