As stated by Help Net Security a new Firefox plugin, "Firesheep", can be used for "sniffing" HTTP sessions that are unencrypted. The plugin can be used for hijacking online services, such as social networks - and other online services that require a login. The Firesheep plugin makes it thereby possible for perpetrators to impersonate users by simply hijacking their sessions at services such as Facebook, WordPress,Twitter, Google, Flickr, Amazon.com etc. Tools like Firesheep - that could be used for privacy breaching purposes - raise the need of developing more secure online services that at least offer full encryption from end to end!