It used to work perfectly for a long time, but recently it's not working (highlight a word, right click, select the option, and dictionary app not taking the word as input), not sure why.

Using macos 12.4, Firefox 110.0 (64.bit), with an intel mac

Works in Big Sur (OS 11.3.1), but you still have to select "look up in dictionary" at the bottom of a pop-down menu, so I wouldn't call it automatic. But you do get the Mt. Rushmore of Mac OS's dictionary, thesaurus, "Apple" and Wiki! Thanks.

It works on my Big Sur, but sadly not in the way I expected. After click "look up", it doesn't show the result directly as in Safari and Chrome, you have to switch to the Dictionary application manually to see the result.

This extension did not work for me with macOS 10.15.6. I downloaded and installed it, refreshed a page, selected a word and right clicked and … nothing happened.

To the developer, thanks for writing this extension, I look forward to using it once it's working reliably.

Good add-on ! I was expecting that the dictionary pop-up will open (like in Safari), and not the full dictionary app.

So far, so good. The Add-On is unobtrusive and does what it claims to.

I'll revisit in a few weeks and bump it to five-stars assuming everything continues to work well.