Maybe this is just unwarranted speculation, but I remember a period many years ago (maybe 10+?) when Firefox was very unstable when hardware acceleration was en

Maybe this is just unwarranted speculation, but I remember a period many years ago (maybe 10+?) when Firefox was very unstable when hardware acceleration was enabled, even on Windows, although it depended on what exactly your hardware was. Eventually the quality of the drivers on Windows made hardware acceleration less unstable on Windows, but that same progress did not happen on Linux (or was happening much slower) so for a while Firefox gave up on Linux hardware acceleration. Anyways, I think it is a case where they were burned before trying to compensate for different levels of driver quality for hardware acceleration and so they are more skittish now and want to proceed slowly. Of course, I have no sources to cite and this is based on half-remembered blogposts from a decade ago, so take this with a grain of salt.