Preview Google Results
Cooliris Previews is a Firefox extension that lets you preview Google results in an inline box when you hover the links. This is useful to decide if that site is really god and relevant for your search.
Cooliris Previews prefetches the sites so they load really fast.
Related:
Inline Google Definitions
Google Toolbar for Firefox 2.0
Reduce RAM usage in Firefox
Labels:
Firefox extensions