Searchery moves the functionality of the Firefox search box into the address bar. This means there's just one place to type what you're looking for and it frees up more room on your screen to see results. All your OpenSearch web search engines are available with just a couple of clicks.
Web search results from Google.com and Amazon.com are available next to your history and bookmark results. So if you're looking for a site you've been to before it's easy to spot, if you're looking for something new it's right there too.