@okias well.. the main idea of hiding behind Firefox ESR is, that every distribution has to updated their toolchain for Firefox anyway, so I might as well require the same 🙃
Just if Firefox ends up requiring 1.76, the jump to 1.77 might be fine, because it's really worth it imho.
@karolherbst Mesa3D is big enough to distros do the same. But before next release, I would aim to enable it by default with some drivers, so distros have more motivation to include #Rusticl