A minha experiência até agora está sendo ótima, a extensão me ajuda muito no meu dia à dia.

Sadly no Indonesian, Javanese, and Balinese language option in this spell checker extension.

Super Tool, kann ich nur empfehlen

A perfect, FOSS tool, that I believe is better than things like grammarly. It is amazing how well it works. Nit-pick mode and the recent addition of synonyms really help when you quickly need to get work done and are a bit too frazzled to do the lifting yourself.
Even for my weird language, the grammar and nit-picking is on point. Highly recommended, I pay for the full service (though I do not strictly need it) to support this great initiative.

Ótimo. Mas, é uma pena que ele só funcione com a linguagem mais formal. ele não reconhece gírias e linguagens usadas mais comumente no dia a dia.

This is the most amazing spell checker and useful add-on on the internet. Good onya Firefox! Thanks.