Thank you for the info!
Is it gonna be investigated further? I know it won’t matter anymore after this October but who knows if this bug isn’t affecting normal statistics.
I’ve noticed some impossible numbers in my add-ons as well - like 20 users in Firefox 43 even when my add-on has strict-min-version set to 52:
https://addons.mozilla.org/en-US/firefox/addon/groupspeeddial/statistics/usage/applications/?last=30
Also I would like to know how the malicious add-ons can get 200k+ users in few weeks: