From MozillaZine Knowledge Base

Background

Firefox 2.0 will include code to optionally record “browser metrics,” or usage statistics, and send the information back to Mozilla for analysis. The goal is that this information will aid developers in choosing features, designing UI behavior, identifying web sites that can cause problems, and other important points of the user experience.

This preference controls whether recorded metrics data are uploaded to the URI specified in metrics.upload.uri.

Possible values and their effects

True

Periodically send metrics data to the URI in metrics.upload.uri.

False

Do not send metrics data. (Default)

Caveats

• metrics.upload.uri must be non-empty and valid for this preference to have an effect.

First checked in

2006-02-02 by Darin Fisher

Has an effect in

• Mozilla Firefox (1.8 branch builds since 2006-02-02 built with metrics extension; 2.0)

Related bugs

• Bug 324558 - Build data collection service to gather browser metrics
• Bug 344366 - data is still collected after setting metrics.upload.enable to false

Related preferences

• metrics.client-id
• metrics.event-count
• metrics.last-session-id
• metrics.upload.cert-host-override
• metrics.upload.next-time
• metrics.upload.uri

External links

• Data collection service added to Firefox (Henrik Gemal's blog)
• Browser Metrics - MozillaWiki