Utility for dictionary support in browser? (Firefox)

Muse

Lifer
Jul 11, 2001
40,473
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My vocabulary is pretty good, but some sites test it. If I highlight a word and right click it I can do a google search on it, but that doesn't mean any of the links presented will provide me with a definition. Ideal would be an item in the context menu that would link me to a definition of the highlighted word. Does this exist? Seems to me I have seen it or had it installed, but I may be confusing this with a spell checker. Does this exist. Seems like it should. Opening a new tab and navigating to a dictionary site, entering the word seems like more trouble than is necessary for this. TIA.