Telemetry is a feature that allows data collection. This is being used to collect performance metrics and other information about how Firefox performs in the wild.

Client-side, this consists of:

  • data collection, e.g. in histograms and scalars

  • assembling Telemetry pings with the general information and the data payload

  • sending them to the server and local ping retention

Note: Mozilla’s data collection policy documents the process and requirements that are applied here.