Telegraph.co.uk: A new Firefox extension called "Firesheep" is drawing attention to the lack of encryption on social networking sites. The extension shows users the access credentials of others who are logged into sites on unsecured wireless networks. With just one click, Firesheep users can then "sidejack" the other users' accounts. By default it shows passwords for Amazon.com, Basecamp, bit.ly, Cisco, CNET, Dropbox, Enom, Evernote, Facebook, Flickr, Github, Google, HackerNews, Harvest, Windows Live, NY Times, Pivotal Tracker, Slicehost, tumblr, Twitter, WordPress, Yahoo and Yelp, but other services can be added as well.
Developer Eric Butler said he created the tool because "it's time for everyone to demand a more secure web. My hope is that Firesheep will help the users win."