FW Update 2.91 does not download on Mac

Partial success…safari was the problem…so I downloaded the firmware upgrade via mozilla.

Followed the instructions and copied it to the media drive via usb on my laptop.

Then I disconnected the media drive from the laptop, turned it on and fired up the media drive app on my ipad.

It does not recognise any firmware or prompt to upgrade as the tutorial on your website shows.

When I try to double click the firmware image file on my ipad it says file not supported.

Im usually quite good at following instructions…am I missing something here…can you help?