Hi malware fighters,
According to security expert Petko Petkov specially crafted browser root kits for Firefox and Explorer will be the malware of choice in the coming future. We think so lightly about browser root kits, but what is nearer to your credit card data as your browser is? Browser root kits are also difficult to detect by conventional av etc. Browser root kits are multi platform malware, malicious Firefox extensions are an example to think of, they can be rebuilt to function as root kits. Even some can infect without the need of changing the source code. Be afraid, be very afraid..... and take your in-browser security seriously, see this link here:
http://www.gnucitizen.org/blog/browser-rootkits &
http://planet-websecurity.org/Browser+Rootkits/polonus