Wireless is a bad idea.
Chrome is the only web browser that will actually show file progress of an upload (Look to the lower left of the window)
It also should be possible to put a folder called DWLD on a USB driver, stick the bin in that, shut off the printer, put the USB in its USB port, then hold the 4 and the Energy saver button down while powering it back up. Release when it gets into Download mode, it should install that way.