Is Firefox 3′s search functions not powerful enough for you?
If you’d like to power it up some, you need to pick up CyberSearch. This extension allow you to perform various Google searches right from the address bar. The fun doesn’t stop there. It also displays the results in the awesome bar format along with your history.
You can do a number of special searches too, depending on the keywords that you use. You can do a Web Search, Local Search, Video Search, Blog Search, News Search, Book Search, Image Search, or Patent Search.
If you still need help wrapping your mind around this tool, be sure to check out the video tutorial on it they have put together for you.