FF add on: when not case sensitive = correct a word without change the case sesnitivity of the 1st letter

idea for correction in the firefox add on:

when selected not case sensitive and one does write a word wrong, it should correct the word, but not the first letter when even when it is written in capital letters.

example:
written: bluetoth
current correction: Bluetooth

my wish would be: bluetooth

why: because when i do select not case sensitive and i write a long text, every correction that integrates a capital letter is a double work for me. because to make it coherent, i have to make the 1st letter as lowercase, again.

any news on that?

still waiting for an answer.