The Download Now link will prompt a local download of the Google Chrome extension. To install the extension directly, open the file using your Chrome browser.
This is an extension for Google Chrome. It gives a way to edit forms using your preferred local text editor. It allows you to write your own functions and assign them to keys with real JavaScript, not forms and buttons. Be powerful and modular enough to allow implementing any not-included feature without touching the extension code. Make some keys that Emacs/Unix/vi users are habituated to do the Right Thing.