AutoComplete is the auto-fill option that has been saved after you browsing something. Usually they saved your e-mail address when you log in to your website and they also saved the keyword that you have enter when searching something.
Why the browser save all sort of things?
It help you to save your time rather than repeating key in the same keyword all over the time. Sometime it helpful and sometime not if there has too many keyword they saved.
Now I teach you how to remove unwanted AutoComplete quickly and easily.
The easy way to delete it is..
- Double-click in the text field so the drop-down box of auto-fill options appears.
- Hold your mouse over the option that you want to remove from auto-fill so that it's highlighted. Don't click on it.
- Press your delete key. The option should be deleted from your AutoComplete.
The sources : about.com