Bugzilla

Just to share some thoughts here, in case they got lost in Slack:
* In the sql query, we're getting page loads from 100% of users and all window types/ETP settings (via use counters)
* However, the subquery `sample` to get the canvas data works on a 1% sample. So XX million are probably more like XX billion
* Another difference is that the canvas telemetry probe is collected per tab, not per page load.
* Lastly, I'm wondering: are we collecting canvas data on every page, or does it need to have at least a canvas element present in order to count even as unknown_none? If the latter, only ~45% of pages even use a canvas element (according to chromestatus)