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Withdrawn as a public session

Session Title

Understanding Firefox Active User Size

Session Leader

K Lars Lohn


Figuring out how many active Firefox users there are is not as simple as just summing the numbers in in our server logs. Are our estimates correct? How can we get a better understanding of our user base while protecting user privacy?


  • Review: our current technique
    • the AUS cookie
    • the formal definition of Active Users
    • summing over a range of days
    • the consequences of "doing the right thing"
  • Research: mining 178G of server logs
    • cookie clearing and user privacy
    • unique ids, average gap size, average run length
  • where do we go from here?
    • a formal definition for a new metric
    • is this accurate?

Interested Attendees

Please add your name here if you're likely to attend this session, this will help prioritize sessions and minimize conflicts

  • Asa Dotzler
  • David Rolnitzky
  • Mozilla Japan (who is TBD)
  • Ken Saunders
  • Sherman
  • Gavin
  • Dave Townsend