change phone number

If you mean the phone number that Firefox remembers when you fill out a form, it may not be stored with the address. Try clicking in the phone number box, then press the Down Arrow key. Firefox may show the old number as an autofill suggestion. Select it and press Delete to remove it, then enter the new number.

Firefox’s Addresses and more settings are mainly for saved address information, so the phone number may instead be part of Firefox’s general form history.

thank you for responding..they really need to put in by address :)