Mozilla is working on the latest version of the Firefox Browser, codenamed Gran Paradiso. The preview edition of Firefox 3 is currently in Alpha stage, and is expected to reach the the first Beta version release in the end of July.
Firefox 3 will feature the bookmarks portion of Places, the feature that at one time was slated to appear in Firefox 2.0, but was later pulled out. The Places feature that is slated to make searching through Browser History and Bookmarks easy, depends on the Open Source SQLite database engine.