Number of users of my addon doesn’t really change over the years in Firefox, but I can see since ~12th of December 2023, the number of “Unknown” users is growing:
What are those?
Currently they make only 1.8% of all users, but this percentage is growing steadily.
Curious. I’ll reach out to the engineering team and see if they have any idea what’s causing this.
Looks like we’re not 100% sure what’s causing this and will need to investigate.
Looks like the main source of “unknown” versions is Firefox for Android.
Thanks!
That explains the December 14th when this happened:
In any case, someone should probably fix or at least report that, right? 
I don’t know if it has been reported on Bugzilla or the addons repo, but if you find/create an issue I’d be happy to pass it along to the right folks 
