This probably isn't of much interest to most of you who read this blog, but Mozilla just struck a major blow for online security and -- as importantly -- accountability. Quick-and-very-dirty layman's explanation: Much of the invisible infrastructure of the Internet depends on "identity certificates" to establish secure connections between a website and your browser. A certificate uses some very clever cryptography to prove that the website is actually the site it claims to be, and your browser alerts you if there are any problems. Once you know that you are connecting to the right website, you can use the certificate to establish an encrypted connection to that website. Every time you do an online credit card transaction with a legitimate vendor, you are depending on an encrypted connection backed by a certificate to keep your credit card data safe as it travels across the public internet.