Apple today seeded the second beta of an upcoming macOS Big Sur 11.3 update to developers for testing purposes, with the new beta coming two weeks after the launch of the first beta and a little over two weeks the release of macOS Big Sur 11.2, a bug fix update.
Developers can download the macOS Big Sur 11.3 beta using the Software Update mechanism in System Preferences after installing the proper profile from the Apple Developer Center.
macOS Big Sur 11.3 introduces more customization options for Safari, adding a way to rearrange the different sections on the Start Page like Favorites, Reading List, Siri Suggestions, Privacy Report, and more. Developers also have access for a new integration to develop features for the Start Page.
Read more at MacRumors.com