The Fall 2017 firmware is now shipping to members of the Roku Beta Developer Program. Developers interested in testing their channels against the latest firmware can enroll in the program here: http://go.roku.com/dev-beta
Developers who've participated in the beta program for previous firmware releases will automatically begin receiving beta builds once they sign an updated non-disclosure act here: http://go.roku.com/reenroll
Once you re-enroll, be sure to review the Roku devices you've previously registered in the program, as they'll begin receiving the Fall OS shortly after your enrollment is completed. Email firstname.lastname@example.org to remove any registered devices from the beta program and revert back to the current production firmware.
The Beta Developer Program is your opportunity to try the latest Roku features, tools, and APIs before they're made publicly available. Not only that, but it provides a chance to catch firmware bugs before they ship to production, assuring your channels are not affected.
We appreciate your help refining the Roku platform!