Feature For: Those who are too lazy to sit in their chair and wait a second or two for the contents of a web page to load when they click on the top-ranking page listed within Google’s search results.

Yes, instead of having to add extra seconds to your uncomfortable life of sitting in front of a computer, the contents of certain top ranking web pages will be prefetched when the actual search engine results are displayed.

Now Google’s faster than ever on Firefox and Mozilla browsers. When you do a search on these browsers, we instruct them to download your top search result in advance, so if you click on it, you’ll get to that page even more quickly.

Enhanced searching with Firefox

More information can be found here