We have introduced a new background service that captures session state
in preferences. Firefox Health Report now moves entries from preferences
to its database at payload generation time.
We've also introduced a few random APIs, such as enqueueTransaction()
and the ability for providers to have access to their own pref branch.
services/metrics will hold generic metrics code. services/healthreport
report will build on top of that to provide the Firefox Health Report
feature. All functionality will land in subsequent patches.
