Works very well. Sadly it doesn't work in the instance where Google can't find the definition in its dictionary.

Just downloaded - works great on my imac

It's terrible. It doesn't provide results for nearly every single lookup. I'd say it's a bust!

its great. had it for a few years on a different computer.

UPDATE: Apparently, this doesn't work well with VPNs. Five stars anyway since it's a great tool or everyone else. Would appreciate a workaround or VPNs though.

Consistently get "Sorry No definition found" for basic words like "basic", "words", and "Enjoy." I added this add-on because of the great reviews but I'm not seeing? What am I doing wrong?

the French dictionary is very incomplete. This makes this extension completely useless at least for this language

good

Amazing extension to use when reading novels!

amazing!

Awesome the one out of five times it works, but even having nailed all the about:config variables, it still sometimes is useless and no definition even appears.

If I could use this with selected words. sometimes I struggle to understand idioms.