Using the Location Bar
Firefox’s Location bar, located in the middle of the navigation toolbar, is where you type the URL of the website you want to visit. At the far right of the Location bar is the Live Bookmark indicator/button. (This button is only displayed for pages that support RSS feeds.) I’m lazy, and many others are, too. Firefox thus figured out that users like to do as little as possible, especially when it comes to typing URLs.
The Location bar enables you to type fully formed URLs. That’s expected. However, Firefox also allows you to type partial URLs and tries to send you to the right website anyway.
For example, in Firefox’s Location bar I typed Jupiter. There is a Jupiter.com (and they make some interesting products), and there’s probably also a Jupiter.net and Jupiter. org. But without more information, Firefox treated this as a search and took me to http://www.solarviews.com/eng/jupiter.htm.