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 extension expands links of shortened URLs, like TinyURL, bit.ly, using the LongURL service (longurl.org). Operates in the background without altering the text or style of anchors -- you won't see it working, but it's there! The cache of expanded URLs may be viewed or cleared in the options page.