Firesheep grabs that cookie, allowing nosy or malicious users to, in essence, be you on the site and have full access to your account.
Firesheep钻了这个空子，让爱管闲事的恶意用户基本上可以用你的身份上网并且完全获取你的账号。
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"I released Firesheep to show that a core and widespread issue in Web site security is being ignored," said Eric Butler, a freelance software developer in Seattle who created the program.