It works well, but you can't exclude the language from fixing.
Also, you can't ignore the same rule in different languages. For example, the rule is that a sentence doesn't start with an uppercase letter. I clicked 'ignore that rule' in English, but in Russian, it still works, and the 'ignore the rule' button doesn't work.

Eigentlich ist das Tool sehr gut, bis auf einige, kleine, doch nervige Dinge, die bereits erwähnt wurden. In deutschen Fachtexten wechselt LT laufend auf Niederländisch, egal wie man das Tool einstellt. Weiter sollte das Pop-Up Fenster nur bei Doppelklicks aufspringen. Bei Texten technischer Art, Tabellen etc. steht das Pop-Up Fenster immer über dem Text, den man bearbeiten möchte. Abschalten geht ja nur ganz, was auch keine Lösung ist.
Dazu kommte: für Privatpersonen, die gerne mehr als das Basic Tool hätten, ist der Preis zu hoch und ein Abo*, ein NoGo!

Ansonsten ein sehr gut gemachtes und sehr nützliches Addon.

je le conseil fortement et c'est rare et meme ma premiere fois que je conseiul une appli, en plus suis cell de base grattuis

This really does a good job. This may be picky but the flow of use is a bit annoying. I start at the top with the cursor, deciding what to do with each successive suggestion. When that is taken care of I want to be able to close the window where I have ended, at the bottom. Instead I need to go back to the top. Picky, I know.

A really good resource for me as a non-native speaker in English and Swedish. Would be good if you could choose between different "stiles" (academic writing, report e.g.). Therefore only 4 stars, but maybe I am too picky.

This application is extremely good, it works on all the pages within Firefox, I highly recommend it, although like everything it has its details: if you have more than one language, it sometimes confuses them and its dictionary of words is limited.

me parait assez bien

great toll for German and Italian and English and as good as Grammerly However, it would great of we would have an addon in MS WORD !!!!!! Grammarly provides such a toll