Safari context menu search extension Does safari has an extension like this Chrome extension called Context Menu Search? It enables user to search highlighted text from the context menu.

It should be something like this:
I needed something similar too!

So look up: CustomSearch. It's highly adaptable by using the integrated CustomSearch Entry Editor.

"CustomSearch allows you to easily send the selected text to one of up to eight search engines — right from the toolbar or a contextual menu. CustomSearch includes search entries for Wikipedia, Google, Bing, and Amazon."