Per The Verge, the new logo was hidden in a surfing mini game in recent versions of Edge from the Canary channel.
The new logo is a sign of the times for Microsoft's current approach to browser technologies it once dominated.
Microsoft kicked off test builds of its Chromium-based browser in April and launched its first beta version for Windows 10, 8, 7 and macOS in August.
Previously, Microsoft Edge shipped with Windows 10 and was only available on Windows 10. Google Chrome is available on Android, Linux, macOS, and Windows.
Microsoft is expected to launch a Stable channel for what some call 'Chredge' in late 2019 or early 2020. A key difference is that it is now unhinged from the Windows 10 release cycle and can take advantage of extensions built for other Chromium-based browsers, including extensions in the Chrome Web Store.