http://msdn.microsoft.com/security/d...l/xpsp2web.asp
- ActiveX controls: the modal dialog will no longer popup automatically. Users must specifically click on the pageholder to install controls
- Downloadable Files: The file download ability can only be initiated by a user click. Pages that say "your download will begin in 10 seconds" and have an ad before launching the file will now fail.
- Popup Windows: These may now only be initiated by a user action, not automatically, and only one popup will be created based on that user action... so a popup cannot spawn a popup, even if the original was spawned by a click.
- MS Java Virtual Machine: This is no longer distributed.
- Browser Windows Alterations: You can no longer do a fullscreen window, it will only launch a maximized window. You can no longer move the statusbar, titlebar or toolbar off of the visible screen.