Overall, this add-on is great, though it has some room for improvement, here are some suggestions:
An option to display the translation pop-up immediately upon text selection.
The audio to help pronunciation is good, but the TTS engine could be better(it's using speech synthesis capabilities provided by the operating system)
An option for a more minimalistic layout for the dictionary to avoid excessive scrolling.

As other users reported, there is still text box ghosting on many sites. It is a pity that developers totally don't care about it.

Exactly what I was looking for. Unfortunately the shortcut does not work for me (German keyboard layout)

IT's finally here, loving it, but it is missing dark mode. Once dark mode is available, it will be 5/5 stars