Calculates how related two given words are by using the API. Requires the Mozilla browser.

Redirects you to the page on which you first clicked a link to the current page.

A read-eval-print loop for JavaScript that works in IE, Mozilla, and Opera. Includes a Mozilla bookmarklet to run shell commands in the context of any web page.

List of keyboard shortcuts.

Find the link to your site in a referring page with one click.

Lets you go to search results by pressing the number of the search result instead of clicking.

Information, resources, and several downloads.

Includes tools for viewing and testing CSS styles, viewing scripts and variables, and showing the structure of a document.

Framed editor: The results of HTML typed in the top frame immediately appear in the bottom frame.

Weblog about developments in the nightly builds.