FastestFox (previously called SmarterFox and Smarter Wikipedia) is a Firefox extension that aims to make Wikipedia more convenient to use from the browser. It adds a "related articles" box to the left side of Wikipedia and integrates Wikipedia's search features into Firefox. It is aimed at Wikipedia power users. There is also a FastestFox Google Chrome extension.
The extension adds the "Search Wikipedia for..." option to context menus using XUL. The "related articles" feature is implemented using an AJAX request to a web API[which?]. Because the request is sent only after the page finishes loading, there is often a delay until results appear.