Why Facebook's about to slow down (and that's probably good)

Your Facebook page is likely about to slow down. Good news: The change will help keep online thieves away. According to a recent blog post, Facebook is in the process of moving all of its users in North America -- and soon the rest of the world -- to a type of Internet connection that is more secure but also tends to slow down Web browsing a bit.

Called HTTPS, as opposed to less-secure HTTP, it's the connection you see on online retail sites when you're about to enter credit card information or a password. Sometimes a little lock icon appears in the browser window when you're connected to a site with HTTPS. (The "s," by the way, stands for "secure.")

source :  Why Facebook's about to slow down (and that's probably good)