Is it FF that doesn't support these things, or Google that doesn't bother supporting browsers that aren't their own? I suspect the answer is somewhere in the m

Is it FF that doesn't support these things, or Google that doesn't bother supporting browsers that aren't their own? I suspect the answer is somewhere in the middle. Here's the bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1703668 https://bugzilla.mozilla.org/show_bug.cgi?id=1703668 - sounds like it would work, but not with acceptable performance at present