Wasn’t it Google that started it all with the what they called the omnibar in the Google Chrome web browser? Basically, instead of separate fields for the web address bar and the search bar, Google Chrome only had its omnibar. In the omnibar, you can either enter the URL of the website you want to go to or use it to search for whatever it is you’re looking for.
In Firefox, it was easy enough to add plugins to install an omnibar plugin. I had the Omnibar plugin for Firefox installed on my old iBook G4 and I find it immensely convenient to use. For Safari users, how do you install an Omnibar?