Bien mais...

Does not support multi-screen // Ne supporte pas les écrans multiples

—> Asking for a word definition from one screen doesn’t open translate tab automatically on the other screen. Setup was: select a word on fullscreen safari and use popclip extension. Translate tab on the other screen highlights but do not open. Once opened, the translation is there though...

Tatsuya Nakadai about Translate Tab, v1.0.4