The Safari 7.1 update is recommended for all OS X Mavericks users and contains improvements to privacy, compatibility, and security.
● Adds DuckDuckGo, a search engine that doesn't track users, as a built-in option in the search field
● Encrypts all Yahoo searches from the search field
● Improves Reader compatibility with websites.
● Improves AutoFill compatibility with websites
For detailed information on the security content of this update, please visit: http://support.apple.com/kb/HT1222.
You can install the update by selecting Software Update from the Apple menu at the top left of your screen.