Today I saw a very useful metric:
Opt-In Rate History
We only collect usage data from users who have agreed to share their diagnostics and usage information with app developers. This data includes Installations, Sessions, Active Devices, Active Last 30 Days, and Crashes. Each day on the chart shows the average opt-in rate of all users who installed Firefox web browser during the last 30 days.
This looks like a one-time thing. Other than the temporary banner on top of the App Analytics page I cannot find a permanent link to this metric.
Is it possible to make this an official metric. So that we can for example chart it against App Units or Installations?
S.