Bem-vindo as Extensões para o Thunderbird.
Adicione recursos e estilos extras para tornar o Thunderbird só seu.
FecharAnálise de Corretor gramatical e ortográfico - LanguageTool por Jonathan Perry-Houts
Avaliado em 5 de 5 estrelas
LanguageTool is a mediocre grammar checker. I can't say I recommend the paid license, but the free plan is a welcome step up from vanilla spell checkers.
This add-on is excellent, however. Very responsive, and well designed. Only limited by the capabilities of LanguageTool itself.
Note, that you should be comfortable trusting a third-party with your privacy before using this tool. You can self-host the LanguageTool service, but by default it will send all of your composed email contents through the LanguageTool public API.
Para criar as suas próprias coleções, você deve ter uma conta no Mozilla Add-ons.