It seems you’re using the setting of the browser add-on, but are typing into LanguageTool - LanguageTool? LanguageTool - LanguageTool is an editor with its own checks, it is not connected to the browser add-on and its settings.
@dnaber
i looked in the windows app and the deeper settings on the homepage / add-on page of firefox, but not just on the top right toolbar where it is prominently written. thank you for that.
@Ruud_Baars
the solution from dnaber is what i needed already. thank you both for for your support!
when i write in a forum where i deactivated the capital letter check function and i write a word wrong, it gets red underlined. so far so good.
however, when i click on it in order to correct it, the suggested word is in capital letters. so the correction function “forgets” that it should correct the word without making a capital letter at the beginning of the corrected word.