All I want is freely translate some words INSTANTLY/FAST, nothing more or less than this!
This work well, it become an icon beside the browser URL, I can quickly translate copied words with just one click on it!
(But I'm not sure is it a costly Google API.)
Unlike those annoying inefficiently translating whole page/selected text/open new window add-ons, such a waste of my time.

Suggestion:
The only considerable suggestion, may upgrade the window(definitely become bigger), make things similar to REAL google translate page that enable user switch/change translating languages.
Just a way to provide more conveniency. Thanks for the developing efforts.