Firesheep was created by Seattle-based software developer Eric Butler who said he created the extension to highlight the security risks associated with session hijacking, also known as sidejacking.
Firesheep targets 26 online services, and includes many popular online services such as Amazon, Facebook, Foursquare, Google, The New York Times, Twitter, Windows Live, Wordpress and Yahoo. The extension is also customizable allowing a hacker to target other Websites not listed by Firesheep.
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