I have spellcheck as you type turned on and it works in a search bar. I cannot get it to work in a webmail window. I have tried with Yahoo Mail (for a friend) and IONOS webmail with one of my own accounts. Neither work. BUT using the same accounts with Chrome I CAN check spelling in email windows as I type. This problem hasn't been raised for some time but I have noticed old posts that give options that didn't work. I don't want to get my friend (who is elderly and easily confused) to convert to Chrome but will have to bite that bullet if a solution isn't available.