This is a maintenance and enhancement release built upon the previous one.

In this release

Added support for "kiosk mode". With the "kiosk mode" configured correctly, your Raspberry Pi will boot straight into a pre-configured web application, where the actual OS UI interface will be hidden from the end-user. With this feature, you have another option to DIY your favourite interactive display gadget. More details on how to configure kiosk mode on this Chromium OS release, please refer to this kiosk-demo-app project.
Note that the "kiosk mode" is enabled by default. Therefore when you boot this image the OS will automatically load kiosk-demo-app without entering OOBE.
To disable "kiosk mode", modify /etc/chrome_dev.conf and remove --force-kiosk-mode flag.

Known issues

This release only works for Raspberry Pi 3B / 3B+ due to known graphics support issues with Pi 4B.
The vpd only gets fully initiated after first boot into UI. Therefore if you wish to enrol your Pi to a Google Chrome device management console, you'd have to reboot it in the UI at least once.
No hardware acceleration support for decoding video streaming, yet.
This release is of a test build, which is by design very insecure (for any production environment), as quoted from Viper: "You must never log in to them with credentials you care about. It will automatically start ssh with root access via well-known credentials."

SHA256(chromiumos_test_image_r77r3-rpi3b.img.xz)= 2cfec812ab21cd8fda2d399deb57de7879e6be1ba749ca8032ef8835ce128cfe