I have the grinder + funnel standing on a coffee scale as I feed beans into it and monitor the amount. That’s why I said I should just get a dosing cup – so that I can weigh out the correct amount beforehand.

Huh? That’s what I’ve been using, but the funnel from mine doesn’t fit into the 1Z at all (at least not the k-ultra), it just sort of manages to be flush with it when I sit it on top of the grinder. That already lead to two cases of me accidentally bumping it and having coffee beans spill all over.

I should just get a dosing cup with a tapered/funnel end.

Firefox, its logo, etc are trademarked and therefore restrictions apply when re-distributing, and that has been the case for as long as I remember. There’s nothing stopping you from compiling it yourself, calling it Firefox, or using their branding, as long as you don’t redistribute your build and modifications to others while still using their branding.