This young extension is an open and secure alternative to proprietary solutions such as Grammarly.

Main Feature: unlike competitors, it does not send anything to remote server unless user explicitly asks it to do so.
Ability to opt-in for automatic checks ONLY for specific websites is a very useful feature and a good design.

Keep up great work!

Generally a good extension, but unfortunately not available for Android.

Continuate così!

Great tool for those who want to write the correct way.

And better yet, is open source.

Ugly icon tho.

Daniel Naber said: "Thanks for your feedback. This extension already works with Firefox 57+"

Great news!!! But somehow it is labeled as "Legacy" in my Add-ons list.

Nice, free, and very useful for non-native english people.

Love it

I love it, it just loses 2 stars for integration I know it is hard, would be great if it just corrected in the text like a normal spellchecker.

For those who have privacy concerns it is really easy to run your own server

Отличное дополнение все просто ясно и понятно и ничего лишнего с удовольствие ставлю 5 звезд

I write:

El niño esta en la guarderia

LanguageTool corrects me:

El niño esta en la guardería

The right thing is:

El niño está en la guardería

other,

I write:

eso esta echo

LanguageTool:

eso esta echo

The right thing is:

Eso está hecho

In Spanish the extension is still green, but it is a good idea