In November 2010, we tested the content-authoring interface within SilverStripe CMS against various major browsers, in order to provide recommendations to our users, and to identify opportunities for improvement.
The testing covered how both performance and functionality within the CMS worked.
To sum up our testing, IE7 and IE8 and FireFox all work well from a functionality perspective. IE7 was slower so we recommend users of IE7 upgrade to IE8 or Firefox. IE6, Safari, and Chrome were not tested, as they are only used by a small percentage of SilverStripe users. When Internet Explorer 9 is released, we hope to repeat the tests.
For a more indepth view into our findings, please download the SilverStripe CMS 2.4 Browser Testing and Recommendations document (PDF, 254KB), which contains much more information on our methodology and conclusions.