Some of the new user interface enhancements include:
- A compact user interface.
- Pinned Sites: Integrates with the Windows 7 taskbar to make web site experience more like an application.
- Security-enabled Download Manager: File transfers and can pause and resume downloads and alerts if a file may be malicious.
- Enhanced Tabs: the new tab page can show most visited sites.
- Add-on Performance Advisor: Shows add-ons that may be slowing down the browser's performance, and allows them to be disabled or removed.
IE9 will only be available for Windows 7, Vista, and Server 2008 (for both 32-bit and 64-bit versions).