regressing on Firefox performance? ! Is crashiness getting worse or better? ! How often do our users experience janky behavior? ! How many active users do we have, anyway?
Many types of events to measure One good system vs many half baked Unify mental models One set of infrastructure quirks One set of errors By Mike Wutzler AKA Darth Mike (Own work) [GFDL (http://www.gnu.org/ copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/ 3.0/) or FAL], via Wikimedia Commons
scheduling for dataset creation !Spark and Parquet: standardized analytical model and data format !Presto: SQL access to many data sets !And more... Now
URL Audit a number all the way down to the code Enforce transparent model of work Open science, open methodology https://xkcd.com/285/ Transparency = [citation needed]
By The original uploader was Lorax at English Wikipedia (Taken by user Lorax and released under the GNU FDL) [GFDL (http://www.gnu. copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons
existing Firefox builds Update via xpi, independent of Fx Update up to daily (for now) on any release channel (Not really an experimental mechanism) System add-ons Photo by Francesco Lodolo, l10n team.