2017-09-15 4:27 GMT-03:00 Volker Krause <[email protected]>: > On Friday, 15 September 2017 05:23:44 CEST Nicolás Alvarez wrote: >> From Mozilla documentation: "So when you say '63% of beta 53 has >> Firefox set as its default browser', make sure you specify it is 63% >> of *pings*, since it is only around 46% of clients. (Apparently users >> with Firefox Beta 53 set as their default browser submit more >> main-pings than users who don't)." > > That is something else though, that's the participation ratio on opt-in. > Measuring that and determining its bias on the submitted data is indeed a > challenge, but I don't see how unique ids help with that?
It has nothing to do with participation ratio; Firefox betas have opt-out telemetry. 63% of Firefox Beta 53 telemetry records (which Mozilla calls "pings") say it was set as the default browser. If you deduplicate using client ID, it turns out 46% of distinct Firefox Beta 53 clients had it set as the default browser. Thus, for some reason users who set it as the default browser send a more frequent telemetry than those who didn't, perhaps because they use the browser more. -- Nicolás
