Ok so I have a MacBook, and whenever i go on facebook to login, it completes the username for me just when i type in one letter. For example let's say my username/email was [email protected], the second i type f in the toolbar, it'll complete the whole email address. i DONT like it and i want to somehow delete the email/username so i can type it out fully, please don't ask why haha it's a long story. so how do i delete this? i already cleared my history and i tried pressing the 'delete' button but it wouldn't work! any tips?