In Firefox you can enable the address bar to show suggestion for websites as and when you type from the history list and also from the list of tabs opened. Instant Preview is a new add-on from Mozilla, which will automatically load pages when you select any website from the suggestions list even though you have not selected the page. Using this add-on you can easily preview pages without having to actually open these pages in the tabs.
As you can see from the image, when nirmaltv.com suggestion is selected, the page is already loaded even though it is not the final selection made.
This add-on helps in getting a quick info to check up on some information, e.g., the weather, stocks, or comics, let the page load as a preview, and once you are done, hit Esc key to get rid of the preview and return to where you left off.
Another advantage is that by the time you actually confirm the request for loading, the page would have automatically loaded.
