Mozilla tracking a week in the life of a Firefox browser
From the 'Mozilla Test Pilot' files:
How many add-ons do you have in Firefox? How much time did you spend in Firefox last week?
If you have opted into the Mozilla Labs Test Pilot add-on survey system -- now you know, and so does Mozilla.
Remember of course that this is all opt-in and Mozilla is anonymizing the data at their end so that it's not personally identifiable.
It's a really interesting set of data that could shed led on how Firefox is actually used by the millions that rely on Firefox.
In my own personal case, the Test Pilot 'A Week in the Life of a Browser' study showed me things that I didn't know about my own browsing habits.