[meta] Telemetry: Usage Statistics, Errors, Feedback

[cvan]

This is a parent (meta) bug for tasks around built-in telemetry mechanisms for projects that have integrated the WebVR Assets Unity package in their games (not only for the Demo scene).

• collect JavaScript errors (call stacks and anonymous browser/platform information) anonymously (no PII) using Sentry so we (Unity WebVR Assets project maintainers) can track errors from usage in the wild (localhost, ngrok, localtunnel, non-HTTPS traffic excluded) (see issue Create a Sentry account for catching JavaScript errors #166)
• create a new JavaScript template file telemetry.js for telemetry services (see issue Create a new JavaScript template file telemetry.js for telemetry services #172)
• collect generic usage information (i.e., basic Google Analytics for determining approximate MAU and DAU) (see issue add default, opt-out Google Analytics script for collecting generic usage information #169)
• collect basic performance timings (e.g., navigation, canvas, WebGL, Unity Engine emscripten module) (see issue collect default, opt-out basic performance timing data in Google Analytics (as custom GA events) #170)
• create a Help modal screen (see issue Add a Help button (with icon and label text) and modal blurb to WebVR Template's on-page UI #167)
• document telemetry services, data-collection practices (see issue Document Data Collection from telemetry services #164)
• submit a Request for Data Collection Review for the folks on the Mozilla Data Metrics team (see issue submit a Request for Data Collection Review (to Mozilla Data Metrics team) #168)

[delapuente]

We agreed on not to include the meta-bug in the milestone. Removing.

[cvan]

this has been completed. thanks a ton, @delapuente!