I’ve finished the documentation for the progress events supported by Firefox 3.1 when using XMLHttpRequest. The relevant information is in these places:
Hopefully this is all reasonably clear. It’s at least fairly well organized, I think. I’m sure there’ll be some tweaks over the coming days/weeks/whatever as suggestions come in. I’ve really appreciated all the helpful feedback I’ve been getting this documentation cycle. It really helps make sure everything is coherent!