This extension solves many problems better than prior translators I've tried. It's very well integrated with the Firefox browser, and could hardly be easier to use. I deeply value the fact that the translation engine is executed locally to the machine, and *not* in a cloud where user data is aggregated. And the quality of machine translation that I see, is not significantly different than Google's service.

One possible improvement might be to allow the user to choose between alternate translations of phrases or sentences.