Microsoft has officially released Internet Explorer 8 with a number of new security features to improve privacy and protect against phishing and cross-site-scripting attacks. IE 8 also includes a feature to block clickjacking attacks, preventing users from clicking an obscured or hidden Web element. A new feature called InPrivate browsing mode, enables users to control whether IE saves a record of their browsing session. The browser also has a built-in feature that analyzes URL strings and highlights the top-level domain in the address bar.
Source: https://threatpost.com/internet-explorer-8-includes-bevy-security-features-032009/72388/