Metrics.last-session-id

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.

Logged events are associated with a browser session. Every time the browser starts, the session ID is incremented. This preference keeps track of that ID.

Possible values and their effects

An integer corresponding to the number of times the browser has started. Sent with metrics data.

First checked in

2006-03-23 by Brian Ryner

Has an effect in

• Mozilla Firefox (1.8 branch builds since 2006-03-23 built with metrics extension; 2.0)

Related bugs

• Bug 324558 - Build data collection service to gather browser metrics
• Bug 331166 - attach a session id to all events

Related preferences

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

External links

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