You get notified of certain errors only checked by having a premium subscription, but it won't tell you where or what the errors are and you can't disable this incredibly annoying behavior. Also, despite the fact that there's no mention of AI in the description, AI integration is all over it (and very limited for free users). Even the name of the extension in the Add-On Manager has AI in it. It's the very first word! What a weird, shady-seeming, and obnoxious extension.
And by the way, LanguageTool, your setup process has at least two typos in it. You can't even be bothered to run your own copy through the AI tools you try to push on us? You failed to inspire confidence from the very beginning and then you lived up to that impression spectacularly.

Works well. With premium, the sentence rewriting comes in handy with all the web apps used for work.

Bis jetzt keine gravierenden fehler gefunden nur auf dieser seite scheint es nicht zu funktionieren

Ik ben een nieuwe gebruiker en ik geloof dat het een heel betrouwbaar hulpmiddel is, dat ook nog gemakkelijk navigeert.

Foi uma grata surpresa este novo corretor ortográfico integrado ao Firefox, as correções sugeridas a nível de ortografia, concordância e gramática são quase sempre corretas. O estilo da pequena janela e os botões de correção são de uso muito prático. O lado ruim é que ele parece apenas funcionar no YouTube ou páginas do Google.

Ótima ferramenta, muito prática e utilíssima

slecht

Spell check feels inferior compared to Grammarly. For example, it doesn't think that phrase "below this corners" contains any errors.

Ótimo, sensacional, muito útil em todas as ocasiões!

Bisher immer korrekt korrigiert :-) Und schön unauffällig das Teilchen

was good once, but for whatever reason isn't working for me anymore in FF, no settings are saved and doesn't appear anymore in any text or spelling corrections etc.
Settings aren't saved anymore no matter what I do.
Gonna fully remove and reinstall and if it still doesn't work gonna look for something else, thankfully there seem to be many competitors in this field.
Not sure why it seems to be working for everybody else still but not for me, based on the reviews by others. Worked fine in the past but then just stopped.

Excellent piece of software. It is much faster and cheaper than Grammarly, without any of the bugs.

LanguageTool is extremely useful to help in writing. It helps me to do a better everyday.