It would be a 5-star add-on, however:

There are some bugs (memory leak/deadlock) in current version of Firefox, which keep eating CPUs (multi-threads!) and memories.

But I see no other replacement, sign

Very high CPU usage!

easy to use
pop on

The only thing I missed after moving from Chrome to Firefox on my Mac was a usable dictionary for all the blogs that I read. Finally its here.

Very nice concept. & I'm amazed the app quite follows material Design. UX feels quite fast too. I'd recommend this over the ''official'' Google's Translate app (which doesn't pop anything out)

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.

One of the never fixed BUGS that has become a pet peeve in this plugin is when you select a word, but the word is near the bottom of the page, when this popup occurs then it too is partially off screen and there is no way to scroll the screen down to see the definition. It renders the plugin unusable. Sadly i doubt the author will fix this due to lack of care or because it doesnt affect him on a daily basis.

Bullshit

Very goood !!!

Is there memory leak in this add-on? My system is Ubuntu 18.04 and the memory usage rate is way high. It goes down when I close the add-on.

Love it! Auto detect foreign languages and translate it on the fly plus gives you meanings/synonyms/uses of the word you selected. Well done guys

No Work

It should be one click and not to have to open other windows to get a meaning of a word. Too bothersome

Simple and easy to use. Lightweight design ~ Marvelous

nice....something that gives prompt result on the webpage that i was looking for...Along with pronounciation

Good add on

就是想要这种的!