GoogleSearch is a combination of 17 search plug-ins that give you access to the following Google searches: Web, Images, Groups, News, Blog, Froogle, Directory, Microsoft, Glossary, Maps, Print, Video, I'm Feeling Lucky, and to site specific services: Site Search, Similar to Current, Linking to current, and Cached Page. Click on the button or select a menu option and the plug-in will search for the highlighted text on a page using the selected engine. If no text has been highlighted, you will be able to enter your search terms in a prompt window.
The GoogleSearch plugin provides also a quick access to various Google search pages, for example: Advanced Image Search or Google Directory. Apart from typical keyword searches, you can search for sites similar to the one that you are viewing or for Web pages that link to it. You can also toggle between the current page and its cached copy.