Firesheep Firefox Add-On Hijacks Twitter, Facebook Over Wi-Fi | News & Opinion | PCMag.com. In case you needed another excuse to carry your own Internet, via 3G tethering to a phone, or a private WiFi application on your smartphone, here it is. The Firesheep add-on to Firefox enables the sniffing and hijacking of anyone on a public WiFi network, and their social networking sites and passwords. Of course, many Facebook users publish the intimate details of their lives already; but, this little gem enables the bad guys to pretend to BE you online. Be careful out there.
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