A Wolf in Sheep's Clothing

The last couple of days have seen the launch and explosive proliferation of a Firefox add-on called Firesheep. It's an incredibly simple program that snoops unsecured Wi-Fi packets to grant you one-click masquerading of other users: if you log into Facebook at the local coffee shop, someone can use Firesheep to become you. Seriously, you can go along to any location with an unsecured Wi-Fi network and steal other users' accounts. ouch!

Here's how to prevent it.