IOS 15.0 build 19A5261w

iOS 15.0 build 19A5261w is the official Beta 1 release of iOS 15, which was released to Apple developers on 7 June 2021 during WWDC 2021.

Safari
Safari 15 was introduced, with an overhauled user interface and navigation system. The URL bar and Navigation bar have been merged into a single floating bar at the bottom of the screen, which remained until build 19A5325f.