Facebook was launched in 2004 and is owned by Facebook Inc. It was founded by Mark Zuckerberg and fellow Harvard students. By 2011, Facebook had over 139 million registered users. The document provides instructions on how to manage Facebook security and privacy settings such as using HTTPS, customizing privacy settings for posts, enabling one-time passwords for login from other devices, and recovering a hacked account. It also offers other tips for maintaining security like limiting personal information, keeping the browser updated, changing passwords regularly, and logging out after use.