https://www.bleepingcomputer.com/news/microsoft/windows-10-insider-build-17704-is-now-available-here-s-whats-new/

Microsoft just released Windows 10 Insider Preview Build 17704 (Redstone 5) to Windows Insiders in the Fast and Skip Ahead Rings. Windows 10 Insider Preview Build 17704 comes with a huge amount of improvements and new features that include ones for Microsoft Edge, new Skype experience, improved Diagnostic Data Viewer, and more.

Microsoft is introducing a new Edge “BETA” icon that will only be seen in Insider preview builds.