I never rate extensions but this one truly deserves praise. In my opinion, this is one of the most well made extensions available for Firefox.

The UI is brilliantly designed, fits a lot of features in a very compact and accessible layout, unparalleled when it comes to dictionary extensions.

The functionality is as promised in the description AND MORE, you get access to Wikipedia, search results, all at the right place at the right time depending on the context and the selection. It is unusually configurable for an extension that performs such a simple task like looking up words - you can edit existing themes, create new themes, add your own css, change sources, change when the extension is triggered - way more than I expected.

I use this extension all the time and not once have I been disappointed.

Great job, dev!