HTTPS Everywhere security extension

HTTPS Everywhere is a Firefox and Chrome extension that encrypts your communications with many major websites, making your browsing more secure. Many sites on the web offer some limited support for encryption over HTTPS, but it can be difficult to turn on by default. Once you install it you don't need to do anything else, it will just use more secure communication when it is available. (Note that this is one of many reasons to upgrade to Chrome or Firefox because of the increased security extensions available)