After the release of Firesheep–a Wi-Fi sniffing Firefox extension that made waves last fall–major companies scrambled to beef up their security. Facebook joins the fray this week by adding in total session HTTPS; a simple toggle in your profile secures your entire browsing session.
Just hit up your security settings (Account -> Account Settings -> Account Security) and check the box that reads Browse Facebook on a secure connection (https) whenever possible.
Visit the link below to read the full announcement from Facebook.
A Continued Commitment to Security [The Facebook Blog]