Search innovation takes can be found in many places. You don’t have to try a new search engine. You don’t even have to leave the current page of your browser. Try these three great Firefox search add-ons!

SemantiFind

SemantiFind promises to deliver more meaningful results by helping you clarify your query.

Once you have installed the SemantiFind Firefox extension, click the “Start Semantifying!” button, go to google.com and type your search terms. SemantiFind will drop down a list of possible searches that clarify your search If you search for “jaguar,” SemantiFind checks if you mean the cat, the car, or the operating system from Apple.

SemantiFind embeds its suggestions on top of your search results page, above the regular Google results. You can save or delete results to personalize what you get in future searches.

HyperWords

With HyperWords, you can select any word on any web page and do lots of useful things: You can search Google, search the website you are on, search a number of social networks like Twitter, Digg or Delicious, search for images, videos, people and news.

You can search for reference on Wikipedia, Wiktionary, Encyclopedia Britannica, Google Definition and Urban Dictionary.

With HyperWords, you can share information with email, through Twitter and Twitter or a number of social bookmarking services with just one click.

There’s more: HyperWords lets you convert currency, translate text and perform advanced searches on the current page.

KwiClick

KwiClick is not exactly a search add-on. It’s more like a Swiss army knife with lots of capabilities which include search and some cool social features.

When you search using the Firefox search box, your search results will pop up in a box and be available as you surf from site to site. By the click of a button, you can move your current search term to Flickr, Twitter, YouTube, Wikipedia, FriendFeed or Google Maps. All within the same pop-up box.

KwiClick opens videos in similar windows so you can watch as you keep surfing. It also lets you watch video comments, share videos by mail and more.

You might also want to take a look at
5 Firefox extensions that will change the way you search
GooglePreview extension for Firefox
Firefox addon summarizes Google search results
Firefox plug-in personalises search results
Customize Google