This new API will help clients who are still using Chrome Apps to migrate to the Web, by using a similar API to chrome.storage.managed Extensions API.
Chrome apps will be deprecated by June 2021. The impacted developers and service providers have the requirement to migrate their Chrome Apps to the Web. To keep the existing user experience, we need to launch a list of new Web APIs with the same functionalities. This one is trying to mimic chrome.storage.managed by allowing Web Apps to query key-value configurations provided by device administrators.