Simplify the following text for a Grade 6 native English-speaking person.
Original: The Omnibox is the URL box at the top of each tab , which combines the functionality of both the Address bar and search box . If a user enters the URL of a site previously searched from , Chrome allows pressing Tab to search the site again directly from the Omnibox .
Simplified: ; Omnibox The Omnibox is the URL box at the top of each tab , based on the one in Opera .