I've been a fan of the simple little feature in Chrome's address bar where I can directly search certain sites by typing part of their URL and then pressing TAB. I live in Germany and use dict.leo.org quite a bit. Searching for a term directly without having to open the start page is a nice little feature. After navigating to and searching the page once, you should be able to see the functionality I just mentioned offerred by Chrome's address bar autocomplete.

OpenSearch Site Search in Chrome address bar - Step 1

Firefox has something similar in their Omnibox, but there is an additional step required for adding this functionality. When your OpenSearch has been recognized a small green plus will appear over the magnifying glass of the Omnibox.

Add new OpenSearch Site Search to Firefox Omnibox - Step 1

Clicking on this will show you that a new search can be added.

Add new OpenSearch Site Search to Firefox Omnibox - Step 2

To enhance your website with this feature you will need the following:

  1. Add this line of code to your site's head:
  <link rel="search" type="application/opensearchdescription+xml" title="and Stuff and Everything Open Search Description" href="/opensearch.xml" />

  1. Create the file opensearch.xml as follows and place it in your root directory:
  <OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">
  <ShortName>Name of your page perhaps</ShortName>
  <Description>Description about your website search here</Description>
  <Image width="16" height="16" type="image/x-icon">your site favicon</Image>
  <Url type="text/html" method="get" template="http://yourwebsiteurl.com/search/?q={searchTerms}"/>

This file has a number of different options, but I only needed these to get the desired functionality on my site.

You can find more information on OpenSearch on the official OpenSearch specs page or on the OpenSearch Wikipedia page.

Some more helpful links that I used: * Add Your Website to Firefox’s Search Bar Using OpenSearch XML - By David Walsh * Making usage of Google Chrome's OmniBox [TAB] Feature for/on personal website? - Post on Stackoverflow * How to add google chrome omnibox-search support for your site?

I make no claim as to what effect this might have on your page visits or clickthroughs, but I think it's a nice little enhancement that doesn't come with much negative baggage.