Matrix used to do this but doesn't anymore [1] and uBlock never had that feature. Please don't make stuff up.

[1] https://github.com/gorhill/uMatrix/issues/927

I don't think it's fair to call not knowing that a feature was removed from a discontinued app "making stuff up."

I was clearly wrong, though it is easy to change your user agent it's unlikely that many Firefox users have done it.

You're right, I misunderstood your comment. I interpreted what you said as in, you can get this feature via either Matrix or uBlock. I see now you meant one of those has the feature and you weren't sure which one had it. Sorry about that. In my defense I think it can be read both ways.

I'd add there is a large gap in usage between uBlock and Matrix. uBlock has over 10 million users whereas Matrix is somewhere over 100,000.

Does uBlock Origin turn that on by default? That's the only way I could imagine such stats being wrong by a wide margin.

By mozilla's own metrics only 30% of their users use any addon at all.