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

It does not change the first source language setting. Fixed chinese is really annoying. Each time I use this add-on, I have to change the source language from chinese EVERY TiME!
Except that it's really useful 5* add-on.

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.