This Add-On should be the 1st recommendation (not just 'bumped' up to the first page) by Mozilla when anyone searches for 'definition' or 'dictionary', because it's brilliant. It's quick, intuitive, and very easy to use, yet effective at its intended task.

"Dictionary Anywhere" is definitely the best "Definition" add-on I've tried (and I've tried close to a dozen in the past week). All of the alternative add-ons that I tested were just not as reliable; and not as polished and "clean-looking" as "Dictionary Anywhere".

Thank you for providing such a useful, simple-to-utilize, yet unobtrusive, add-on for my current Firefox 'setup'. Outstanding job, meetDeveloper!