> [...] then that telemetry data all of a sudden becomes the most personal of data.

> What does Firefox telemetry data include? According to the Mozilla wiki, telemetry data includes all the information needed to answer the following questions:

  How long does it take Firefox to start?
  How long does it take Firefox to load a web page?
  How much memory is Firefox consuming?
  How frequently do the Firefox cycle collector and garbage collector run?
  Was your session successfully restored when you last launched Firefox?