According to the release notes for the first iOS 9.2 beta, the Safari View Controller (the view of Safari you see within apps) is being updated with support for third-party Action Extensions that will let it more closely mirror the Safari app. It also includes options to reload content and request a desktop site, as in Safari, and iOS 9.2 beta 2 improves Safari View Controller further, introducing support for dismissing it with an edge swipe.
Apple has also release the second beta of OS X El Capitan 10.11.2 to the public. This release doesn’t include any outward facing changes, but there are most likely bug fixes throughout the system. One difference you will notice is the fact that this beta includes support for AT&T NumberSync technology to be used with your iOS 9.2 beta 2 iPhone.
Apple has notified developers and the public to pay attention to Graphics, Wi-Fi, Calendar, USB, Notes, Photos, and Spotlight as they are all getting the most improvements.
Public beta testers can download this build by going to the “Updates” tab within the Mac App Store.