Some people are too impatient and want it to work without reading the manual.

2 of the 4 lines of the 'instructions manual' say:
"Just toggle-on for the tab you want and double-click / select the word and you're good to go."

Initially it didn't work (for me). I saw the new icon, played with it, and realized it had to be 'toggled-on' for it to work.

It works as in the photos. Sound too.

I was curious to see how it looks on a dark page. It looks the same. A few pixels of external-border-line would look better but not a big deal.

As with similar programs, it works on main-form words ( delay ), not variations (delaying). But if you just select [delay]ing , it will show up the definition with no-click-needed (what many people want, me included).

Thanks to the developer for giving us a working replacement for that other extension that stopped working.

Works most about 80% of the time.