Original sentence: Exchange 2010 requires Internet Explorer 7 or later, Mozilla Firefox 3.01 and later, Google Chrome or Apple Safari 3.1 and later for full functionality, however performs checks on the operating system type to restrict Mac OS X and Linux users to Firefox or Safari, thereby making Google Chrome only officially compatible on their Windows operating system even though there is very little difference in their JavaScript and rendering capabilities between platforms
Edited sentence: Exchange 2010 requires Internet Explorer 7 or later, Mozilla Firefox 3.01 and later, Google Chrome or Apple Safari 3.1 and later for full functionality, however performs needless checks on the operating system type to restrict Mac OS X and Linux users to Firefox or Safari, thereby making Google Chrome only officially compatible on their Windows operating system even though there is very little difference in their JavaScript and rendering capabilities between platforms