One of the most common mistakes people have with web browsers is typing a web address in the search bar. When I first was using web browsers it was the opposite problem that was more common: people typing in search terms as web addresses.
Either way people sometimes end up with the wrong web page.
The problem is made even more complicated by, most peoples home pages have a search engine, and also all the tool bars that end up on peoples browsers.
To deal with this problem some web browsers have address bar to the left and search bar to the right. Others have integrated search engine with the address bar.
Many people know the difference between search bar and address bar, however many do not.