Interesting, I just tried this in latest Firefox on the Mac with VoiceOver as well, and in the first example, the column and row headers are reversed when they are spoken, so instead of saying „ISBN & 13“ like Safari and VoiceOver do, VoiceOver will say „13 & ISBN“. Same with row headers. It will speak the author first and then the region. I’ll defer to @jcsteh to answer whether there is already a bug for this. Since for the Cache The World project, the whole table support has been completely rewritten, and this was after the Firefox version you tested, it is worth revisiting the Firefox results on Windows I think. I no longer use Windows currently, so am not set up to test that myself. But yeah, tables have always been hard to get right.