I found to my delight that the Colorsoft Kids bundle from the October Prime Day shipped with 5.18.0.2.
This is fantastic because this still allowed using a Captive Portal to escape the Initial Registration, which I think went away with the more recent firmwares.
Would anyone happen to know the proper past firmware download URL's for this model?
The pattern from earlier Kindles doesn't seem to work - the below is *NOT FOUND*
Code:
https://s3.amazonaws.com/firmwaredownloads/update_kindle_colorsoft_5.18.0.2.bin