On https://data.firefox.com/dashboard/hardware , some of the summaries seem to refer to a state of things so old that it no longer even shows up on the graph.
Also, it seems it would be worthwhile to add Apple to GPU vendors and add labels for more recent operating system versions.
(It would also be nice to have a way to zoom into the non-top operating system versions; the two top items push all the others into such a crowd that it’s hard to make sense of anything but the top two.)