Windows 7 Tip: 
Google Preview is a Mozilla Firefox browser extension that inserts preview images (thumbnails) of web sites and popularity ranks into the Google and Yahoo search results pages. Thumbnails are created and provided by GooglePreview servers.
See Also: 12 Alternates of Google Search Engine
How to Use it:-
* Install Google Preview Extension here, After installation restart your Firefox, and try a search on a Google search site or Yahoo.
*To disable GooglePreview click on 
in the status bar (bottom right corner) -> 
click again to enable.
*If you only see gray borders next to the search results, you may have the ‘Redirect Remover’ extension installed. In this case please add ‘googlepreview.com’ to white list of ‘Redirect Remover’.
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