Esta extensión debería venir por defecto con Firefox. Excelente.

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For grammar junkies like me ( seeing/hearing a grammatical error has the same effect as the sound of fingernails on a chalkboard.), this is the ultimate Godsend. I sincerely can't say enough thanks. This snappy app also removes my ego-centered issue/phobia of accidentally sending out my writings with grammar sewage within because I somehow missed one (or more - eegads!). This is a sanity saving tool I want on my browser forever and a day. Outstanding job, dev!

Дуже корисний додаток. Допомагає часто відшукати ті помилки, котрі втомленими очима вже не помічаєш.

It does what it says it will do, and that's what's important.

Меня все устроило

Ty

Is this extension send text to ge languagetool.org servers for checking?

Great! If you don't like sending your data to a third party network you can use this add on with a locally hosted instance on your computer or on a private network.

I simply run language tool from the command line like this:

languagetool --http --allow-origin "*"
default port is 8081 but you can specify another one by adding this : --port 666

then in the add on preferences simply change the LanguageTool API Server URL to:
http://localhost:8081/v2/

LanguageTool is a very useful spell- and grammar checker. It is easy to use and open source. A must have if you want to write in a language that is not 100% in your grasp.

The new version significantly improved the usability of this very useful add-on! Keep up the good work!