Windows 7: Exploiting the portable edition of Firefox.

I've been a Firefox enthusiast from the get-go. Initially my interest was due to Defensive Computing, Firefox didn't support ActiveX and BHOs making it safer by default.
Of course, much of the enthusiasm for Firefox is now driven by the many available extensions. But if there was ever a coin with two sides, this is it.
On the one hand, anyone can create a Firefox extension, which has given us thousands to chose from.
On the other hand, there is no security wall around Firefox extensions, they are given free reign within the browser.