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"Firesheep 0.1 could not be installed because it is not compatible with Firefox 3.6.9."

And yes, WinPcap is installed. I don't think it should matter, but I'm running Windows XP on a VirtualBox.

Oh, you just need to update to the latest version of Firefox (3.6.11). Your version is out of date and not secure. http://www.mozilla.org/security/known-vulnerabilities/firefo...

Thanks. It works now with FF 3.6.11. Your extension is amazing.

What should happen if you use iPhone tethering? Could it top into the vast people on that network? (I have absolutely no idea). If this is the case, the internet will have a panic attack in 2 days max.

No. Cabled tethering to a cell phone only gives you access to your own packets. It's like a switched network where only packets addressed to you are sent to you.

On 802.11 wireless networks your wireless network card is capable of capturing traffic addressed to other computers. When encryption isn't used or is compromised, you can steal their credentials.

Doing something similar against cellular networks would require a much more sophisticated attack with specialized hardware that's largely illegal in the United States. I would also hope that cellular communications are encrypted these days.

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