I'm Feeling Lucky is a free Chrome add-on developed by lerxst. This add-on falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. With I'm Feeling Lucky, users can easily access the "I'm Feeling Lucky" search result directly from the Chrome address bar.

To use this add-on, simply type a backslash ("\") followed by a space or tab in the address bar. This will invoke the extension. Then, enter your search keywords and press enter. The add-on will automatically redirect you to Google's top search result for that query.

Overall, I'm Feeling Lucky provides a convenient and time-saving way to quickly access the most relevant search result without having to go through the regular search results page. It is a handy tool for those who prefer to directly access the top result for their searches.