Problem with scrolling behaviour in the popup. Also it doesn't remember the target language.

The UI works really bad (the window often opens outside of the visible area and other stressful little things), and it randomly ceases to translate at all, so I suspect that the developer abandoned this project. It's a pity, because with a bit of work, it could be a very good and useful add-on.

Great limitation: only translate TO english. In preferences there is no a way to set a different target language.