Steps to reproduce: 1. Set up a search engine keyword, e.g., "w" for Wikipedia. 2. Type "w foo" in the location bar (don't hit Enter). Firefox 4.0 behavior: Location bar reads "w foo". No visual indication is given that hitting Enter will actually search Wikipedia instead of behaving like for any other search term. Chrome 13 dev behavior: As soon as you type "w ", it disappears. The left part of the search box becomes a gray box that says "Search en.wikipedia.org:", and the rest is empty, with the cursor at the beginning. Hitting backspace returns to the normal search box, with just "w" in it, same as Firefox. This is a nice touch that makes Chrome's search keywords implementation slightly less mysterious than Firefox's.
This is mostly a dupe of bug 445955 except for the UI. We currently show a special awesomebar result for bookmark keywords to indicate that a search will happen. It seems like you'd prefer UI in the awesomebar itself.
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