word help: Why is Firefox’s spell checker trying to correct the possessive form of certain words that are grammatically correct? - Help.com

Okay, thanks.

I went ahead and added the word to the dictionary so it doesn’t henceforth get flagged.

saklf wrote:
I don’t think ‘anyone else’s’ is grammatically correct, actually. I think it’s fine for informal/spoken English but as far as the actual rules of grammar, I don’t think you’re supposed to do that.

Really? Well, I did question whether it was grammatically correct after it was flagged. I did a little research in order to determine if it was indeed grammatically correct, but I couldn’t find too much.

Upon further investigation, I would have to conclude that “anyone else’s” is grammatically correct. It seems that if “someone else’s” or “anybody else’s” is acceptable, which they seem to be according to dictionary sources, I would have no reason to believe that “anyone else’s” would be an exception. Furthermore, Microsoft Office Word doesn’t flag the use of word “else’s” when it follows the pronoun “anyone.”