This would have been an easy 5-stars if we could only add a key to activate the search function. I mean, we all double-click stuff all the time, but how many times have you meant to check the definition of the text rather than just copy it or something?

Would really like a filter list for websites. I don't need this to appear on DuckDuckGo page, for example.

It's still not quite at the level or speed of Google Dictionary (by Google) in the Chrome Browser, but it's OK. I think it has to do with integration; that is, if the Firefox team created a built-into the browser version, rather than it being an add-on or extension, it would be more fluid. Since Chrome Browser has built-in spell check, I'm guessing it has some connection to that interface type. Why else would their pop-up results be so instant? No really, why?

This has suddenly stopped working. I guess the recent Firefox update must have broken the extension. Please, please fix it!

Good. But сan you switch the transcription to the standard IPA symbols?

I find it incredibly handy to be able to just double click a word on any website and immediately be shown its definition in a simple coloured box with large type.
The only thing that *really* bothers me is if you double click on a plural word you are only told "plural form of (whatever word you double clicked)". If I'm double clicking a word, it's not because I'm confused by the presence of an 's' at the end of it, it's because I would like to see the definition of the root word. So frustrating!
Developers, please fix this!!

Please give us an option of metakey (cmd, ctrl, alt, shift) that is required to press before the popup appears. Thank you for an excellent extension!

Very useful English dictionary.

Only problem: the "more" open a page with nothing. When I select a word in the page, please pass it to the definition window. Please, add a saving option, to save my words/definition, or an annotation.

Perfect... but it does not work for PDF's text

Thought it would work by highlighting the word. Didn't realized you had to double click.

While it is already good, it could be the best if it had history feature for the words(similar to Google Dictionary).

GOOD

Needs some options, often present in add-ons:
- selection – other than by double click
- hot-key activation / open with a bubble . . .
- contextual menu
- history
- define the position and the dimensions of the pop-up

Sometimes, reinstalling solves some problems.

It's good except for the fact that the dictionary used is not giving a really clear definition of the words to be checked.
I suggest using the Oxford Dictionary for your app.

Works well, but I don't like the fact that a large popup blocks the page whenever I double click a word.

Better alternatives for me would be getting the popup from the right-click context menu, or maybe by clicking on a small bubble that appears after double clicking (like with some of the translator add-ons).

It does what it says, which is great, and even more great is the fact that I don't have to manually install any dictionaries or do much configuration. The only sore point for me is the need to double click a word to highlight it, which is less practical (IMHO) than a selecting a word with the mouse and getting to see its meaning via the context menu. Some websites, including news outlets, set up scripts to show popups on double click, which is why a context menu option is more desirable in such cases. I hope the developers introduce this option in later versions.