it was on homepage to download, but they took it away. at the moment there is nothing to download for nano3 on their homepage. if anyone has any other firmware for nano 3 please provide it that i can try it.
you have to go to their website canaan.io/support/file_download, or when you go to their site, all the way to the right says support, and then click file download, they have firmware there to download
There is no firmware download for the Avalon Nano 3. The website you are referring to is providing only the recovery tool!