<P> Safari 4 also includes the following new features: </P> <Ul> <Li> Completely passes the Acid3 standards test </Li> <Li> Cover Flow browsing for History and Bookmarks </Li> <Li> Improved developer tools, including Web Inspector, CSS element viewing, JavaScript debugger and profiler, offline table and database management with SQL support, and resource graphs </Li> <Li> Nitro JavaScript engine that executes JavaScript up to eight times faster than Internet Explorer 8 and more than four times faster than Firefox 3 </Li> <Li> Native Windows look on Windows (Aero, Luna, Classic, etc., depending on OS and settings) with standard Windows font rendering and optional Apple font rendering </Li> <Li> Support for CSS image retouching effects </Li> <Li> Support for CSS Canvas </Li> <Li> Speculative loading, where Safari loads the documents, scripts, and style information that are required to view a web page ahead of time </Li> <Li> Support for HTML5 </Li> <Li> Top Sites, which displays up to 24 thumbnails of a user's most frequently visited pages on startup </Li> </Ul> <Li> Completely passes the Acid3 standards test </Li> <Li> Cover Flow browsing for History and Bookmarks </Li>

Where can you find the required browser and operating system details