The first thing you’ll notice with IE9 is that just how “light” it looks. Even though the IE9 chrome takes up less screen real estate than both Chrome and Firefox 4, it was actually not a goal of the team to build the smallest chrome. A fundamental concept of the new approach to Internet Explorer’s design is that “it is not about the pixel count, but what you do with it”.
Whilst the team doesn’t claim their single-line design as the solution to the tabs-over-address bar dilemma, it was decided after all the two-line configuration was too distracting for users. The team also determined the window’s title bar was redundant because the name of the page was already displayed in the tab.
To further reduce the number of concepts in the chrome, the address bar was merged with the search bar after statistics showed that people used both bars just as much to search. They found that the new OneBox is not just simpler but actually helps people feel like they’ve mastered the functionality of the browser and gives them more confidence to just search without thinking about which field to search in.
Read more: I Start Something